Home | Ezine | Forums | Links | Contact
NitroExpress.com: 9.3mm / 300 Remington Ultra Mag Wildcat Project

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

Pages: 1
pillshooter
.224 member


Reged: 05/11/05
Posts: 22
Loc: Sherwood, Oregon USA
9.3mm / 300 Remington Ultra Mag Wildcat Project
      #43458 - 08/12/05 04:17 PM

To The Group:

Does anyone have any reference to this wildcat. I am in the process of building one and I don't want to re-invent the wheel. I was able to pick up a new Rem 700 SPS in 300 RUM for $369 USD and I have a chamber reamer on order from pacific tool and die. I can get a custom barrel made but don't have much else to go on. I was told by Dave Kiff that this is a HOT calibler in Europe given the 9.3mm bullets there. Based on my rough calculation this should be a real boomer on par with the 378 Weatherby. Any help would be great.

Thanks

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


Reged: 21/09/05
Posts: 192
Loc: St. Albans Maine U.S.A.
Re: 9.3mm / 300 Remington Ultra Mag Wildcat Project [Re: pillshooter]
      #44032 - 15/12/05 09:40 AM


From my experience with developing the .366 DGW I would guess you will be about 300 feet per second behind the .378. The .366 DGW is based on the .416 Rigby case and thus has a lot more case capasity then the Ultra case. I can push 250 grain bullets at 3253 FPS with 54,800 C.U.P and 300 grain slugs at a bit over 2900 with 48,000 C.U.P. Your Ultra running simular pressures should be 150 to 200 fps slower.
As to loading data I would start with the middle loads for the .338 Ultra, since your bore size is larger you can push your bullets the same speed with less pressure. Check for pressure as you work up from there. You should find that IMR 4350 will work well with the 250 grain bullets and either H4831 or the IMR 4831 with the heavier bullets. Do not try the 320 grain bullets as they are designed for only 1800 to 2200 fps and you will find the true meaning of bullet failure with them. Also if you want to run the 286 grain Barnes X bullet you will need a 1 in 12 twist or keep the velosity around 2800 or the do not stabilise. (They are about 1/4" longer then a 300 grain Swift A Frame). Good luck, have fun, be careful, and I hope I have been of some help. If you have any questions feel free to call me our shop has 20 years experience in working with Wildcats.

--------------------
It is the small calibers that are the biggest bores.

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


Reged: 10/08/05
Posts: 26994
Loc: Beautiful British Columbia, Ca...
Re: 9.3mm / 300 Remington Ultra Mag Wildcat Project [Re: pillshooter]
      #44088 - 16/12/05 07:46 AM

sorry- did not note the Ultra-mag case being used

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


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

Edited by Daryl_S (16/12/05 08:11 AM)

Post Extras: Print Post   Remind Me!   Notify Moderator  
333_okh
.275 member


Reged: 24/12/05
Posts: 87
Loc: Northern California
Re: 9.3mm / 300 Remington Ultra Mag Wildcat Project [Re: DarylS]
      #44784 - 24/12/05 01:34 PM

you might want to see this thread?

http://forums.accuratereloading.com/groupee/forums/a/tpc/f/3221043/m/813108093

It really was already done in the 1930s

Post Extras: Print Post   Remind Me!   Notify Moderator  
Pages: 1


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

Extra information
0 registered and 480 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: 3503

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