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Shooting & Reloading - Mausers, Big Bores and others >> Big Bore Rifles
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bonanza
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Reged: 17/05/04
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Loc: South Carolina
.375 H&H Reduced velocity load.
      #141630 - 06/09/09 07:31 AM

Bullet: 270 gr. Hornady
Powder: 70 gr. H1000

Average 3 shot velocity: ~ 1780 fps

1.5 inch group @100 yards

--------------------


"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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9.3x57
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Re: .375 H&H Reduced velocity load. [Re: bonanza]
      #141635 - 06/09/09 08:50 AM

Looks good.

I use AA5744 powder and the 220 grain FP for 2400+ fps and similar accuracy.

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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?

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bonanza
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Re: .375 H&H Reduced velocity load. [Re: 9.3x57]
      #141647 - 06/09/09 01:45 PM

9.3,

My objective was not a reduced load, but reduced velocity; 70 grains almost fills the case.

I tried reduced loads with 4198, hang fire, bad ju ju.

--------------------


"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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9.3x57
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Reged: 22/04/07
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Re: .375 H&H Reduced velocity load. [Re: bonanza]
      #141664 - 06/09/09 11:52 PM

My objective was identical velocity of my 300 grain load {2450} plus similar zero using a light bullet for 9.3x57 performance from the larger case.

I got that with no problems with ignition, etc. 5744 does NOT act like 4198, 4227 or 2400 though all of those can be used to obtain similar objectives at times with appropriate loads. The big advantage of 5744 is that it burns well and I've never experienced a single hangfire with it. Not saying it isn't possible, but the powder is designed specifically for light charges in big cases.

One other feature of the load is that because powder charge is light, so is the recoil. Seems about like a .30-06 with 180 grain load tho the actual ballistics duplicate the 220 gr load in the '06.

I believe a 5744 load could be worked up easily for heavy bullet that would be cheaper {less powder} and a bit less recoil than the slow-powder/full-case load.

Do you have any problem with unburnt powder in that H1000 load?

{and by the way, I have been using IMR7828SSC with great results in my .264 Win Mag, another powder that might work for your objective of full-case/reduced velocity load}.

Your approach reminds me of the slow-powder/full-case/cast bullet loads that many have used with very fine accuracy, tho with some unburnt powder at times.



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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?

Edited by 9.3x57 (07/09/09 12:00 AM)

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JabaliHunter
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Reged: 16/05/07
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Re: .375 H&H Reduced velocity load. [Re: 9.3x57]
      #141697 - 07/09/09 09:53 PM

Interesting - Does that load require a filler?

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9.3x57
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Re: .375 H&H Reduced velocity load. [Re: JabaliHunter]
      #141699 - 07/09/09 11:06 PM

Quote:

Interesting - Does that load require a filler?



Great question and NO! I gave up on fillers years ago.

Accurate states emphatically that no fillers should be used with 5744.

I might add that the goal to obtain same zero was met at 100 meters {300 gr/2450 fps, 220 gr/2450 fps} when the forestock was bedded with strong upward pressure on the barrel {the way my SAKO came form the factory}. Subsequently, after 20 years and a bunch of abuse, a reblue, etc, the gun developed some bedding issues {not related to this 5744 testing} and I freefloated the barrel, bringing back most of its accuracy {it has had 2000+ rounds thru it}, however...with freefloated barrel, the zero of the full-power 300 load is not the same as the 220 download. I think a little tinkering might improve that.

Other bullets can be used with 5744; heavy or light, jacketed or cast. I believe a ".375 Winchester/Heavy .38-55" load could easily be worked up with this powder.

I've had good success with 2400 in the '06 case {without filler} but when moving to the bigger cases 5744 is the way to go IMO. I think it would be a real winner for some of the big NE rounds, especially in singles where regulation is not an issue.

5744 was developed for the bigbore blackpowder crowd, and loads are available thru Accurate Arms/Western Powder for BP-velocity duplicate performance with the cleaner-burning, lighter-kicking 5744.

I do not believe full-speed Nitro Express performance can be reached with acceptable pressures using this powder, but I could be wrong there. But with the .375 H&H Magnum, really useful "9.3x57-to-.9.3x62"-equivalent loads are waiting for anyone who wants to give it a whirl. For USA hunting of deer, black bear and pigs it's hard to think of better-performing rounds. Light kick and very deadly. Sierra 200's, Hornady 220's and 225's and Speer 235's would all work very well I do believe.

--------------------
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?

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bonanza
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Reged: 17/05/04
Posts: 2335
Loc: South Carolina
Re: .375 H&H Reduced velocity load. [Re: 9.3x57]
      #141735 - 08/09/09 10:30 AM

9.3,

Lots of unburned powder but no hangfires with 250 primers. I was trying to work-up something with what powder I had on the shelf. Back when I had my .375 double the 270 bullet recoiled the least (don't know why) so that is were I started.

I use filler in my 500/450 NE and .577 BPE, but never in a HP case.

In regards to the bullet, (one can debate this forever) I tend to shoot the heaviest practical bullet for max SD at the slowest practical velocity (for reduced recoil).

The price I pay is an atrocious ballistic arc. Max point blank range is around 180 yards.

With that said, I have no problems shooting a max load if called for.

I just got a brand new Bushnell 3200 3x10x40 for my .264 WM and look froward to seeing what those 100 grain Nosler ballistic tip will do - at 300 yards

--------------------


"Speak Precisely" G. Gordon Liddy.

"Life is absurd, chaotic and we must define its purpose with our actions" Abert Camus

"I''m the dude playing a dude disguised as another dude."

"Yo! Mr. White"

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mauserand9mm
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Reged: 03/09/09
Posts: 1039
Loc: Queensland, Australia
Re: .375 H&H Reduced velocity load. [Re: bonanza]
      #141744 - 08/09/09 01:23 PM

I've tried 270gn lead GC and 30 grains of AR2207. The powder hardly fills the case and I initially used half a cotton ball as a filler (needed it to stop hangfires) and it looked like a pillow exploded everytime I fired it . I found that I could do away with filler if I used magnum primers.

Accuracy hasn't been good but my rifle prefers 300gn+ in the jacketed stuff anyway.

The recoil is somewhat less than a 308.

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500grains
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Reged: 16/02/04
Posts: 4732
Loc: Salt Lake City, Utah USA
Re: .375 H&H Reduced velocity load. [Re: mauserand9mm]
      #141745 - 08/09/09 01:54 PM

I used some 38-55 bullets in a .375 H&H. They shot about 2 inches at 100 yards and were going 3000 fps. The sure tore the deer up. I think I used 3031.

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