Velocity ?

Hartblood · August 13, 2013, 02:57 AM

I purchased some 9mm 124 gr. Copper platted bullets. The actual weight ranges from 123 to 125. Using AutoComp powder.

Will I see much difference in the velocity using the same powder charge?

Loaded up 123 to 123.5 gr. rounds not tested yet.

Have tested the 125's they average 1030 fps.

WESHOOT2 · August 13, 2013, 06:44 AM

Maybe.

Velocity spread occurs for many reasons. I doubt the wee weight variance will be significant (I suggest the case will have greater significance).

Hartblood · August 13, 2013, 01:04 PM

Well just went to the range and tested the lighter weight rounds. They came back a little slower at 938 fps. So it is not much but it is to slow for USPSA.

August 13, 2013, 02:57 AM	#1
Hartblood Member Join Date: May 11, 2013 Posts: 28	Velocity ? I purchased some 9mm 124 gr. Copper platted bullets. The actual weight ranges from 123 to 125. Using AutoComp powder. Will I see much difference in the velocity using the same powder charge? Loaded up 123 to 123.5 gr. rounds not tested yet. Have tested the 125's they average 1030 fps.

August 13, 2013, 06:44 AM	#2
WESHOOT2 Senior Member Join Date: February 20, 1999 Location: home on the range; Vermont (Caspian country) Posts: 14,324	Maybe. Velocity spread occurs for many reasons. I doubt the wee weight variance will be significant (I suggest the case will have greater significance). __________________ . "all my ammo is mostly retired factory ammo"

August 13, 2013, 01:04 PM	#3
Hartblood Member Join Date: May 11, 2013 Posts: 28	Well just went to the range and tested the lighter weight rounds. They came back a little slower at 938 fps. So it is not much but it is to slow for USPSA.