thought i would share this experience i had today.
was shooting my 357 mag. blackhawk. the load was 125 xtps. the mv was about 1600 fps (very warm). anyway, i loaded five rounds but only shot two because the primer cup was flowing back into the firing pin hole and tying up the cylinder.
out of curiosity, i decided to measure the coal of the remaining three rounds in the cylinder. i figured that the bullets might have walked out a bit, due to the heavy recoil and the medium crimp applied to the rounds.
well, the original coal of the rounds (the ones still in the box) is 1.583". the coal of the three rounds i pulled from the cylinder are 1.589", 1.591" and 1.593".
that is quite a bit of walking! i'm going to re-crimp the rest of the rounds and see if that cures the problem. if not, i'll check the expander plug diameter on the sizing die.
anyway, i thought i'd pass this on for your enjoyment and amusement.
murf
was shooting my 357 mag. blackhawk. the load was 125 xtps. the mv was about 1600 fps (very warm). anyway, i loaded five rounds but only shot two because the primer cup was flowing back into the firing pin hole and tying up the cylinder.
out of curiosity, i decided to measure the coal of the remaining three rounds in the cylinder. i figured that the bullets might have walked out a bit, due to the heavy recoil and the medium crimp applied to the rounds.
well, the original coal of the rounds (the ones still in the box) is 1.583". the coal of the three rounds i pulled from the cylinder are 1.589", 1.591" and 1.593".
that is quite a bit of walking! i'm going to re-crimp the rest of the rounds and see if that cures the problem. if not, i'll check the expander plug diameter on the sizing die.
anyway, i thought i'd pass this on for your enjoyment and amusement.
murf