Home | Ezine | Forums | Links | Contact
NitroExpress.com: A new 375?

View recent messages : 24 hours | 48 hours | 7 days | 14 days | 30 days | 60 days | More Smilies


*** Enjoy NitroExpress.com? Participate and join in. ***
You are not logged in. [Login] Main Index · Search · Active Topics
New user · Who's Online · FAQ · Calendar

Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
Previous topic Previous   View all topics Index   Next topic Next   Threaded Mode Threaded  

Pages: 1 | 2 | >> (show all)
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
A new 375?
      #183471 - 12/06/11 12:46 AM

Got a little project cooking and need some input to keep the wheels turning. We are going to take some .375 H&H dies turn off .45", run some .45-90 starline brass through them and call them ..... Not sure yet. For testing I have a modified mosin nagant action ready to handle the case (only single shot for testing) and a Douglas match grade barrel that someone chambered to .375 H&H and bo-boed the start of the threads. So we will shorten up, thread and away we go looking for the next great ........ Single shot round, lever or maybe even a double round. Guess we will see where the pressure ends up at certain performance levels. Looking to reach the reduced .375 loads that many African hunters load to for better terminal results. Questions, comments or concerns anyone?

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #183474 - 12/06/11 12:54 AM

Smoke - you should be looking at a couple more grains capacity than a 9.3x62mm or .375/06IMP.

It is possible the .376 Steyr and your .375x2.4" will be quite similar to identical in capacity, except your's is about 1/10" longer, while the Steyr has a slightly larger shoulder, ergo, similar capacities.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #183476 - 12/06/11 01:10 AM

That's what I was thinking in regards to the steyr. As soon as she's bent up I'll post water grains and we'll go from there.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #183478 - 12/06/11 01:13 AM

Good thinking and use of dies, etc.

so cool to use the dead die box for a host of projects, case or bullet form dies, to crimpers & full-die sets as you've done - simple stuff to sort out, just time and measurements.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #185804 - 14/07/11 02:13 PM

Finally got dies cut and some starline brass smashed into them. Sized well as long as case neck was lubed inside and out. With just .450" cut off the dies the neck ends up slightly shorter than the h&h but I think we will leave as is for the little added case capacity. On that note this new case will hold 80 grns of water to the case mouth. Identical capacity to the Steyr as suspected. Started on the Mosin tonight so hopefully she goes boom in a week or two. One of these days I'll learn to post pics just not tonight. If anyone wants to volunteer picture posting let me know and I can email some pics.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #185835 - 15/07/11 02:14 AM

80gr. is what my .375/06IMP Winchester brass holds, however I prefer the smaller capacity RPa nd Fed cases at 78gr.

Exciting ballistics.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: DarylS]
      #185869 - 15/07/11 08:53 AM



Centre 2 are 'Smoke's' .375 on on the .45/90 case, capacity 80gr., with .45/90on the right and .375H&H on the left.

Smoke has named his round a .38-80, rather the calibre and length as in English ctgs., he's used calibre and case capacity in gr.

As noted, this round should be a really good one, duplicating the .376 Steyr, which is a bit better than .375H&H ballistics of 1912.(the ballistics that made it famous BTW)

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Edited by CptCurl (17/07/11 09:39 PM)

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #185873 - 15/07/11 11:10 AM

They are actually based on the .45-90 with a finished case length of 2.43". They grow a little from the .45-90's 2.4" case

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #185896 - 16/07/11 01:07 AM

I edited my post to reflect this. I should have gone back and re-read the entire post - forgot you were going to use the .45/90 case. Still an excellent choice.

Steyr data should be useable, but start at Hornady's starting loads and go from there as pressure indicates. As in the .376 Steyr and my .375/06IMP, BLC2 and H4895 wil be very good powders for it.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #185903 - 16/07/11 03:52 AM

Thanx for the help Darryl can't wait to get this one rolling. Will draw up blueprints over the next few days and post here to make it official. Name will have one small variation, I will add mine as many have done. It will be the .38-80 Ahlstrom.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: Smoke73]
      #188206 - 20/08/11 04:21 PM

Been working on the Mosin action for the test rifle. Action has been accurized, bolt cut off and new one welded in rear position. Receiver has new bolt slot milled out, bottom milled for larger case and bolthead opened up. Ready to set up to chamber. Did I mention hours of filing, stoning and sanding. Getting pumped, it looks like a bolt action should. Stay tuned.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
tophet1
.400 member


Reged: 15/09/07
Posts: 1873
Loc: NSW, Australia
Re: A new 375? [Re: Smoke73]
      #188207 - 20/08/11 05:47 PM

Interesting. Being unfamiliar with North American cartridges of this vintage, what other firearms do you think this will work in ? Sharps type single shots ? Lever guns ? what ? Got any photos of the Mosin please ?

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: tophet1]
      #188230 - 21/08/11 12:58 AM

Should work well in most any single shot. I think pressures will be to high for a double conversion but we'll see. Should work in 1886 Winchesters and might work in a highly modified newer Marlin 1895. Enfields would make a good candidate. Snapped a pic while milling and will try to get some if we chamber today. Then I'll try to figure out how to post pics. Been putting that off a while.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
9.3x57
.450 member


Reged: 22/04/07
Posts: 5561
Loc: United States
Re: A new 375? [Re: Smoke73]
      #188237 - 21/08/11 07:50 AM

Looks really cool!

I've always wanted Marlin to introduce their 1895 in .38-56. A perfect round for that action. Unlike the .33 Winchester which fits the original "real" 1895/95 Marlin but does not fit the modern "1895" {actually a modified 336} the .38-56 is loaded to OAL's similar to the .45-70 factory loads and should work very well. A .375 cal, it would be a real killer with .375 Hornady 220FP's.

Kind of like a Little Brother to Smoke's .45-90/.375.

--------------------
What are the Rosary, the Cross or the Crucifix other than tools to help maintain the fortress of our faith in Jesus Christ, the Son of God?

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: 9.3x57]
      #188276 - 22/08/11 12:01 AM

Better yet would the 38-56 ackley improved, .375/348 ackley improved, .375/350 Rem Mag in a factory offering. These cartridges come very close to the .375 holland and holland for horsepower. I think that Marlin, Winchester and Browning have been missing the mark for years by chambering cartridges in sizes that tend not to appeal to consumers. Their only attempt, the .375 Winchester was just a high pressure standardized .38-55 which raised few if any eyebrows. Now bring out a .375 cal in a cartridge that will push a 270 grain in the 2500+ fps range and you'd see sales of the fabled .45/70 drop in favour of the new offering but what do I know.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
9.3x57
.450 member


Reged: 22/04/07
Posts: 5561
Loc: United States
Re: A new 375? [Re: Smoke73]
      #188277 - 22/08/11 01:50 AM

I agree Smoke.

A larger base case than the .375 Win would be a peach as a starter. And for caliber, the .375 is it IMO. There are a few excellent bullets ready for it.

But alas, the heyday of leverguns is over, except maybe for the .444 and .45-70.

And with Marlin's turmoil and poor quality complaints coming from everywhere now that Remington bought them, I seriously wonder if that company will be a player in the future at all. Shame, as the Marlin 336/1895 action is a superb action.

--------------------
What are the Rosary, the Cross or the Crucifix other than tools to help maintain the fortress of our faith in Jesus Christ, the Son of God?

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: 9.3x57]
      #188415 - 24/08/11 05:49 AM

Well it's chambered but didn't turn out like we thought it should but I think we won the battle. I bought the Douglas barrel in new condition but it had been chambered. I was told it was 375 h&h and the barrel was stamped .375. Turns out it was actually reamed for 375 AI so changes had to be made. I cut barrel down so that the 38-80 was short chambered. Cut in with 375h&h reamer for headspaceing and throating. Then built a bushing for a 7mm STW reamer and ran in to clean up body and shoulder. After this we polished the chamber and it turned out great. Fireformed one brass late last night and this cartridge looks great. Water capacity is now 88.8 grains. I'll have to draw something up if anyone is interested in seeing exactly what we have. But with only four grains less than a 375 h&h in a cartridge that can fit in cheap military actions or leverguns, I think I may have some inquiries.

My hats off to Bob at Custom Gunworxs for all the help chambering. He turned this potential disaster into a promising wildcat.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #188426 - 24/08/11 09:12 AM

OK- what's the length of the ctg? Is it still 2.4"?

Here's a 2" verison, using belted brass, belt turned off, so only a .532" rim. In this instance, a .350 Rem mag case.

To the right of it, is a 9.3x57, which is 2.244" Overall case length.
Your case has some 26+ grains greater capacity.


--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #188438 - 24/08/11 01:42 PM

Ends up 2.405 case length, .605 rim, .500 casehead, .494 at shoulder, 25 deg. shoulder, didn't measure the neck but didn't change from the .38-80 pictured above. Worked over the receiver tonight and it's feeding really well. Will modify the mag tomorrow and she'll be ready to throw in a stock. Might make elk season opener if I can figure out how to seat the bullet. Going to send brass away to Lee for custom dies but that's gonna take a bit.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #188481 - 25/08/11 01:10 AM

Oh nice - hope the .003" taper per side is OK.

My .375/06IMP has only .005" taper per side and it's better than fine - love the straight cases.

Of course, you're aware that the minimal taper means virtually no bolt thrust and other pressure signs are needed to be heeded - with this litle taper, pressure signs can be virtualy invisible. A chronograph is absolutely necessary when developing loads.

I'd think, that at 88.8gr. capacity, you'll easily match H&H factory and perhaps exceed it a bit - safely. Is it necessary, though?

Varget might just be one of the best powders for it, but the case capacity is pushing into slower yet powders. It should easily deliver reasonable speeds.

It would be nice if you didn't have to use the 4350's and compressed loads.

DIES - a Hornady seater die will work for any .375.

As your shoulder is larger than a .376 Styer, their sizer will only be VERY useful in initial necking of brass. You could perhaps lapp out the shoulder area, changing their sizer into the proper size for your round.

If Hornady makes a neck sizer for the .376 Styer, it will more than likely work perfectly for neck sizing your round - or you could have tham make you a sizer - probably around $100.00. Some guys don't like them (apparently), but I love my Hornady dies. They are straighter than any green box (RCBS) dies I ever bought.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #188552 - 25/08/11 10:00 PM

I plan to utilize the extra capacity to lower pressures and make this a more reliable cartridge in all weather conditions. Someone else can do the hotrodding. To me reliability and shootability put more game on the ground than feet per second.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #188560 - 26/08/11 01:27 AM

Was attempting to suggest a wary eye while developing loads. The chronograph is vitally important due to 'normal' pressure signs being invisible with such slight taper in the case. In a smooth chamber, there is no such thing as sticky bolt lift when pressures get up there.

Keeping the velocities this side of insane is why I suggested Varget - or perhaps RE#15 might do as well. Varget is slightly more stable in cold or warm climates.

I'm quite excited to see how it shoots and some load/ballitics reported. I'm thinking normal top-end or very close to top end 9.3x62 or moderate .375 Styer data would be useful as a starting point when using powders such as H4895 and Varget. I measured 9.3x62 factory Sako brass capacity as 78gr.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #188588 - 26/08/11 08:21 AM

Had my eye on .376Steyr varget loads as well. I am looking for moderate 375 h&h velocities so things should be this side of sane. I am aware of tests performed on straight walled ackley cartridges so I will be watching chrono with a close eye.

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
DarylS
.700 member


Reged: 10/08/05
Posts: 27509
Loc: Beautiful British Columbia, Ca...
Re: A new 375? [Re: Smoke73]
      #188597 - 26/08/11 11:12 AM

I've had more than a couple Ackely IMP rounds that I REALLY had to watch the velocities & pressure signs on.

--------------------
Daryl


"a gun without hammers is like a Spaniel without ears" King George V

Post Extras: Print Post   Remind Me!   Notify Moderator  
Smoke73
.300 member


Reged: 30/05/11
Posts: 164
Loc: Rocky Mtn. House Alberta
Re: A new 375? [Re: DarylS]
      #200549 - 25/01/12 11:44 AM

Thought I would finally try my hand at loading pictures. These are from a while back when I was chambering and reworking that pesky ruskie action. I have to many projects on the go so this one will be going soon. Metal is blued just need to glass bed and send it on it's way. I hate selling guns, especially my first wildcat but the outback is calling and the funds gotta come from somewhere.
http://s1054.photobucket.com/albums/s497/Smoke73/?action=view&current=photo-2.jpg

http://s1054.photobucket.com/albums/s497/Smoke73/?action=view&current=photo-1.jpg

http://s1054.photobucket.com/albums/s497/Smoke73/?action=view&current=photo.jpg

--------------------
Your not tired, you just think your tired, you don't even know what the hell tired is.- Garth Ahlstrom (Thanx Dad love ya)

"When one of them is born, their god says ' Go in peace.'
When one of us is born our Gods say "Go hunting."- J. Emmett Willie

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1 | 2 | >> (show all)


Previous topic Previous   View all topics Index   Next topic Next   Threaded Mode Threaded  

Extra information
0 registered and 62 anonymous users are browsing this forum.

Moderator:   

Print Topic

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Topic views: 11410

Rate this topic

Jump to

Contact Us NitroExpress.com

Powered by UBB.threads™ 6.5.5


Home | Ezine | Forums | Links | Contact


Copyright 2003 to 2011 - all rights reserved