Discussion in 'Handloading and Reloading' started by Encoreman, Mar 5, 2021.
When you change COL, re-work load.
Are you saying you want increase COL simply to lower pressure? This will decrease velocity; however, it will be only by a small amount. It will also reduce total bullet/case tension holding the bullet in the case. So, with only a taper crimp, you could be increasing the odds of the bullet coming out of the case and jamming the cylinder.
Just be aware.
According to multiple reloading manuals. A .020 change in seating depth can raise pressure to 50,000 psi in 9mm.
This being a 10mm the larger case capacity will be less affected by the seating depth. But it will still be substantial.
I agree that he is risking bullet jump by doing this. One locked up revolver taught me a lesson on seating really long.
No, one reason was I think a 1.250" 10mm looks stupid for one thing. I just figured a pressure decrease couldn't be a bad thing. I was also thinking the closer I could get the bullet to the barrel it would be a shorter jump. Why would the bullet jump, if it is crimped into place? The Hornady XTP's are plenty long enough, there is at least 1/4" or more just guessing not at my loading bench. Thanks for the replies gentlemen. Mac
I think I might be seeing some bullet creep due to recoil at higher charge levels, but I have not yet confirmed with a caliper.
I know that in all my pistols that the longest COL that feeds and chambers tends to be very slightly more accurate,
Others report that a 0.015" jump, or such, is most accurate.
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