redclay
Member
I am reloading for a DPMS Lr 308b with 18" barrell. Wondering what powders would you experienced guys use. Have been loading Varget and my groups are not what I think they should be. Any recommendations?
Type WT(gr) fill(%) vel(fps) Pmax(psi) Burn(%)
IMR 3031 43.9 101 2,654 54,000 100
Winchester 748 46.5 93 2,641 54,000 98
IMR 4895 46.5 100 2,637 54,000 95
Hodgdon BL-C2 48.5 96 2,634 54,000 97
Accurate 2495 44.4 101 2,626 54,000 100
Accurate 2520 47.0 98 2,623 54,000 98
Hodgdon H4895 45.0 97 2,614 54,000 96
Ramshot TAC 45.6 92 2,603 54,000 97
Hodgdon H322 42.1 94 2,602 54,000 99
Vihtavuori N540 47.1 101 2,600 54,000 99
Vihtavuori N530 43.6 94 2,595 54,000 97
Vihtavuori N140 45.6 100 2,583 54,000 99
Accurate 2460 45.6 92 2,582 54,000 98
Alliant RL-12 44.1 93 2,573 54,000 99
Accurate 2230 44.7 90 2,572 54,000 98
Alliant RL-10x 39.7 91 2,571 54,000 100
Hodg Benchmark 43.0 94 2,550 54,000 97
Vihtavuori N133 42.1 99 2,539 54,000 100
Vihtavuori N130 40.5 94 2,527 54,000 100
Another DPMS Lr 308b. Are you using small base dies to reload? Just wondered as 3 other posters had a problem using standard dies. IMR 4895 works well for 308 win.
You did look at the data, didn't you?looking for faster powders it has nothing to do with the length of the barrel only.
I'm afraid I have no idea how a shorter barrel increases accuracy,With 18" is what you get you gain accuracy and sacrifice speed.
It should be an amazing 500 yards system with 150-168 grainers
What data? Do not need to look at any data, it is the same with any load in the universe.You did look at the data, didn't you?
It is very much both barrel length and bullet weight dependent.
I'm afraid I have no idea how a shorter barrel increases accuracy,
and extended ranges require optimal muzzle velocity -- which generally requires
matching 'a' faster powder to the chosen bullet weight for shorter the barrel length.
... if you want to keep your velocity up/avoid increased muzzle blast/flash
You are almost perfectly right there.I have picked up some H 4895 and some 168grn Match Kings. I will load up some samples and see where they hit paper and go from there.