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Shooting & Reloading - Mausers, Big Bores and others >> Rifles
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alaskan
.224 member


Reged: 27/08/07
Posts: 22
Loc: alaska
300 grain bullets for 338 win
      #101048 - 01/04/08 05:15 AM

Does anyone have any reloading information for shooting 300 grain bullets in the 338 win mag. velocity, etc.?

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rscott
.333 member


Reged: 21/03/08
Posts: 328
Loc: wyo., USA
Re: 300 grain bullets for 338 win [Re: alaskan]
      #101122 - 01/04/08 10:24 PM

hodgdon data manual #26. has data for several different powders and bullet weights including 300. try abebooks.com and if no luck i'll try to scan mine and pm the data.
never used 300's in mine but have had excellent results with the discontinued speer tungsten core solid 275gr.
have a couple boxes laying around if you're interested.

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Paul
.400 member


Reged: 28/08/07
Posts: 1031
Loc: Melbourne, Victoria, Australia
Re: 300 grain bullets for 338 win [Re: rscott]
      #101205 - 02/04/08 01:11 PM

A guy called Sal on another forum once told me he used 63.5 grains of IMR 4831 and got 2300fps with the 300gr slug and that it was accurate. Some of his other loads seemed reasonably hot, so you might start a bit below that.

Some Winchester data I handwrote into my book says 68.5 gr of Win 785 (still got a bit) should give 2375 fps at 50,500 (psi?)with the 300 gr PowerPoint bullet. Once again, I think that was a maximum. As explained, these sources are bit apocryphal, so take care.

I have not used either of these loads, as the bushfires cleared out our hunting range before some Woodleigh projectiles arrived and I decided to go back to 250 grainers in case of longer shots.

Cheers
- Paul

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DarylS
.700 member


Reged: 10/08/05
Posts: 26531
Loc: Beautiful British Columbia, Ca...
Re: 300 grain bullets for 338 win [Re: Paul]
      #101255 - 03/04/08 12:39 AM

The .338 max's out at closer to 63,000PSI, I think. The trouble with pressure #'s, is there are three different indicators used for the same actual pressure.
: CUP is copper units of pressure.
: PSI in the States is a transducer reading of direct stress chamber pressure.
: CIP in Europe, I don't know what the letters stand for,(maybe 'copper indicated pressure'?) but they list the end result as PSI, ie: CIP = 56,000PSI;
: In the States, the old copper crusher method would list virtually the same pressure level as 55,000CUP(or 56,000CUP) and if a transducer was used, 63,000PSI - all the same load.
: Trouble is, people mix up the #'s and names and it's easy to do.
: CUP does no co-relate to PSI, as a max CUP for the .338 is probably somewhere around 52,000 to 56,000CUP. This is actually closer to 63,000PSI (US measure) but is around 53,000 to 57,000CIP's PSI - rather confusing, isn't it.
: As far as I know, only the .45/70, .450Marlin and .44 mag have identical #'s of both CUP and PSI(transducer). ie: 40,000CUP is also 40,000PSI. The .458 WM's numbers are close.
: You should be able to get close to 2,400fps or a bit over with a 300gr. in a 24" .338. The correct powder, of course will have to be used and ther are a lot of them in the burn rate required.

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


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

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rscott
.333 member


Reged: 21/03/08
Posts: 328
Loc: wyo., USA
Re: 300 grain bullets for 338 win [Re: DarylS]
      #101690 - 05/04/08 10:42 PM

you can find hodgdon data mentioned above in the Loadbooks USA 'one book/one caliber' manual for .338 Winchester.

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BFaucett
.333 member


Reged: 13/01/04
Posts: 449
Loc: Houston, Texas
Re: 300 grain bullets for 338 win [Re: alaskan]
      #101759 - 06/04/08 10:31 AM




Note: I believe the 53,200 PSI pressure figure for IMR-4831 is probably supposed to read CUP instead of PSI since all of the other data is listed in CUP.

Data available online at: http://data.hodgdon.com/


Cheers!
-Bob F.

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BFaucett
.333 member


Reged: 13/01/04
Posts: 449
Loc: Houston, Texas
Re: 300 grain bullets for 338 win [Re: DarylS]
      #101764 - 06/04/08 10:49 AM

Quote:


: CIP in Europe, I don't know what the letters stand for,(maybe 'copper indicated pressure'?) but they list the end result as PSI, ie: CIP = 56,000PSI ...




CIP = Commission Internationale Permanente

For more info, see:
http://en.wikipedia.org/wiki/Commission_..._Feu_Portatives

The CIP web site:
http://www.cip-bp.org/
(in French)

CIP is basically the European equivalent of SAAMI. http://www.saami.org/

-Bob F.

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