chiltech500
Member
I know you are talking about pistols but my experience was in 30-06 sitting and prone rapid fire, that a load of 175 SMK and 55.0 grains of IMR 4350 felt as though it kicked more than a load of 175 SMK and 47.0 IMR 4895. The velocities are basically the same, the only differences are powder charge weights and burn rate.
Powder burn rate for pistols does have an effect on function. All automatic mechanisms open up while there still is residual barrel pressure. This pressure aids in ejection of the cartridge.
This may apply, which is why a fast burning powder can create less recoil in an auto pistol due to ejection being accomplished at a powder charge that has a lower velocity. (?)
I don't have my Lymans at work and I don't remember the load of Bullseye I used (I would know it if I saw the range). For the N310 I used the max load of 4.0gr which results in 892 fps.
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