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338 allen mag

 
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  #1  
Old 03-23-2009, 05:12 PM
gbp gbp is offline
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338 allen mag

curious if any one is using any powder other than h50bmg and if so what loads - combination. 50 bmg is impossible to get it seems

ThanX
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Old 03-23-2009, 09:49 PM
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Re: 338 allen mag

There are alot of powders that will work very well. H-50BMG is just the best all around powder.

The very slow burning ball powders work great and will actually get a bit more velocity then H-50BMG. In some cases alot more but they are not nearly as stable with temp changes. If your shooting and hunting in the same area and can develope a load in the temps you will be hunting in, the ball powders are amazing in the 338 AM.

These ball powders are:

AA8700 (if you can find any left)
H-870 (again, if you can find it)
H-US869

Surplus powders:

WC872
WC860

All of these work very well. With the 300 gr SMK, I generally start at around 138 grains and work up from there watching for the regular pressure signs.

For stick powders, H-50BMG is by far the best but VV 20N29 will also work very well. It will also offer a bit higher load densities. I usually start at the same 138 gr with 20N29 and work up from there. In some rifles, you will run out of case capacity before you pressure out but still work up slowly and pay attention to pressure signs.
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  #3  
Old 03-26-2009, 01:21 PM
gbp gbp is offline
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Re: 338 allen mag

Thank you for the info, I'll check some of these out
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