43 grains of Accurate Arms 2520 and any 168/175 he match bullet. It is a ball powder with a pressure curve compatible with M-14 gas systems. Meters through powder drops + or - .2 tenths of a grain. They call it the Camp Perry powder.
I’ve never even seen a jug of this stuff. Is it readily available nowadays?
Hodgdon done some testing on powders and temps and velocity changes.
Varget was 8 fps in .308 from 0-125 f.
AA2520 was 63 fps velocity spread.
IMR4064 was 46 fps RL15 was 50 fps spread
Win748 was 114 fps.
If you work up loads in the cold be sure to test them in the heat.
The velocity spread does not hurt my loading so much as group size changes do.
I load below max loads on most of my stuff.
Just be informed about pressures..
Velocity and pressures do not always follow the same upward path either.
I would really like to see pressure changes..I have read some AA2520 loads that were shot in the heat but worked up in the cold ended in pierced primers.
And very hard to open bolts.
Play safe with your reloading.
https://www.hodgdon.com/wp-content/...-test-results-for-temperature-sensitivity.pdf
Varget was 8 fps in .308 from 0-125 f.
AA2520 was 63 fps velocity spread.
IMR4064 was 46 fps RL15 was 50 fps spread
Win748 was 114 fps.
If you work up loads in the cold be sure to test them in the heat.
The velocity spread does not hurt my loading so much as group size changes do.
I load below max loads on most of my stuff.
Just be informed about pressures..
Velocity and pressures do not always follow the same upward path either.
I would really like to see pressure changes..I have read some AA2520 loads that were shot in the heat but worked up in the cold ended in pierced primers.
And very hard to open bolts.
Play safe with your reloading.
https://www.hodgdon.com/wp-content/...-test-results-for-temperature-sensitivity.pdf
Lapua brass, 165 gr Corelokt, CCI 250 primer, and 43 grs. Varget.
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