rope stretcher
Member
Good morning folks,
I’m looking for any input on this subject, Sorry if I’m long-winded here. I recently got a Glock 20 and started reloading 10mm.
I made 4 different loads, 2 of plated 180 grains bullets and 2 of Speer 165 gr GDHP.
Each of the loads tested higher on the chrony than I’d expected but the 165 grain loads were a good bit higher than published velocities and beat up the brass upon extraction/ejection (a little nick in the rim of some and dent in the case body). Spent primers looked fine. The much slower loaded plated brass looked fine.
Components were:
• new Starline brass
• Win LPP
• Speer GDHP 165 gr
• 9.0 and 9.5 grains of Power Pistol
• OAL for both loads were 1.255
Speer manual lists starting and max charges at 9.0 and 10.0 for Power Pistol. So I loaded the “start” load, 9.0 gr of PP and split the difference between “start” and “max” and loaded some at 9.5 gr of PP.
Velocities were: 9.0 gr Power Pistol 1,300 FPS (1204 in manual)
9.5 gr Power Pistol 1,340 FPS (estimate around 1,260, or so in manual)
I think my chrony is measuring OK because I shot some factory ammo and the measured velocity was within single digits of velocity listed on the box. It seems like 1,300 FPS and above for the 165 gr weight is pushing it a bit.
Anyone have any thoughts on this? I really like Power Pistol but maybe it’s not a good choice for 10mm?
Thank you.
I’m looking for any input on this subject, Sorry if I’m long-winded here. I recently got a Glock 20 and started reloading 10mm.
I made 4 different loads, 2 of plated 180 grains bullets and 2 of Speer 165 gr GDHP.
Each of the loads tested higher on the chrony than I’d expected but the 165 grain loads were a good bit higher than published velocities and beat up the brass upon extraction/ejection (a little nick in the rim of some and dent in the case body). Spent primers looked fine. The much slower loaded plated brass looked fine.
Components were:
• new Starline brass
• Win LPP
• Speer GDHP 165 gr
• 9.0 and 9.5 grains of Power Pistol
• OAL for both loads were 1.255
Speer manual lists starting and max charges at 9.0 and 10.0 for Power Pistol. So I loaded the “start” load, 9.0 gr of PP and split the difference between “start” and “max” and loaded some at 9.5 gr of PP.
Velocities were: 9.0 gr Power Pistol 1,300 FPS (1204 in manual)
9.5 gr Power Pistol 1,340 FPS (estimate around 1,260, or so in manual)
I think my chrony is measuring OK because I shot some factory ammo and the measured velocity was within single digits of velocity listed on the box. It seems like 1,300 FPS and above for the 165 gr weight is pushing it a bit.
Anyone have any thoughts on this? I really like Power Pistol but maybe it’s not a good choice for 10mm?
Thank you.
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