Clark
Member
I bought 32 pounds of surplus IMR4895 pull down powder from the 1960s. I got it from Hi-Tech ammo in 2000 for $8/#
http://iidbs.com/hitech/
The velocities seen on the chrono and the threshold of primer pocket growth did not match the Quickload predictions of velocity and pressure.
A week ago I was getting ready to go elk hunting and I had primers falling out at the range with .308, 45 gr surplus IMR4895 Sierra 2125 moly coated 150 gr boat tail hunting bullets 2.784" just barely do not touch the lands. 20" barrel, 2940 fps, extractor groove growth was .001 to .003".
This should not happen, not even per IMR's conservative data.
Either the powder is aging, and/or the bulk powder was always way faster than the canister equivalent.
I went back to all my range reports for 6 years in 30-06, 308, 8mm, and 257 Roberts Ackley.
It seems that Quickload predicts everything nicely over the last 6 years if I interpolate between H322 and Re10X.
The surplus IMR4895 is faster than the H322, but slower than the Re10X.
And all these years, I have been saying that my surplus IMR4895 is just as good as store bought IMR4895 in the purple can, just because the groups are just as good
I guess you get what you pay for.
http://iidbs.com/hitech/
The velocities seen on the chrono and the threshold of primer pocket growth did not match the Quickload predictions of velocity and pressure.
A week ago I was getting ready to go elk hunting and I had primers falling out at the range with .308, 45 gr surplus IMR4895 Sierra 2125 moly coated 150 gr boat tail hunting bullets 2.784" just barely do not touch the lands. 20" barrel, 2940 fps, extractor groove growth was .001 to .003".
This should not happen, not even per IMR's conservative data.
Either the powder is aging, and/or the bulk powder was always way faster than the canister equivalent.
I went back to all my range reports for 6 years in 30-06, 308, 8mm, and 257 Roberts Ackley.
It seems that Quickload predicts everything nicely over the last 6 years if I interpolate between H322 and Re10X.
The surplus IMR4895 is faster than the H322, but slower than the Re10X.
And all these years, I have been saying that my surplus IMR4895 is just as good as store bought IMR4895 in the purple can, just because the groups are just as good
I guess you get what you pay for.
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