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Velocity question on 45 ACP.
nick357
Member Posts: 61 ✭✭
Hi I load my own Ammo using the following.
Magtech no 2 1/2 large pistol Primers
Bullseye 5.7 GN
230 GN fmj Round head
This in the Book gives it 859 FPS, but this is from a s&w 1955 with a 6-1/2 inch Barrel at 1 in 15 twist. Question is how much does the Velocity increase per inch of Barrel over the 6-1/2?.
Thanks.
Nick.
Sorry posted in wrong Forum [:I].
Hi all thanks for the info, once again I miss wrote what I was trying to say, the Gun I use it in is an Enfield with a 12 inch Thompson SMG Barrel, the Load is what I use from the Speer Reloading Manual number 11, I know it is a bit old [:)].
Thanks again.
Nick.
Magtech no 2 1/2 large pistol Primers
Bullseye 5.7 GN
230 GN fmj Round head
This in the Book gives it 859 FPS, but this is from a s&w 1955 with a 6-1/2 inch Barrel at 1 in 15 twist. Question is how much does the Velocity increase per inch of Barrel over the 6-1/2?.
Thanks.
Nick.
Sorry posted in wrong Forum [:I].
Hi all thanks for the info, once again I miss wrote what I was trying to say, the Gun I use it in is an Enfield with a 12 inch Thompson SMG Barrel, the Load is what I use from the Speer Reloading Manual number 11, I know it is a bit old [:)].
Thanks again.
Nick.
Comments
The only real way to determine MV is too shoot in over a chronograph.
Take good care of that 25-2, they are great guns.
Hi I load my own Ammo using the following.
Magtech no 2 1/2 large pistol Primers
Bullseye 5.7 GN
230 GN fmj Round head
This in the Book gives it 859 FPS, but this is from a s&w 1955 with a 6-1/2 inch Barrel at 1 in 15 twist. Question is how much does the Velocity increase per inch of Barrel over the 6-1/2?.
Thanks.
Nick.
Sorry posted in wrong Forum [:I].
Hi, Nick! Got a chronograph? No? Well let's look at this using bass-ackwards science. The cylinder gap will lose 'about' as much velocity as the 1.5in barrel will gain (over the 5in M1911 used to work up the loads in the reloading manuals)...so you are good to go with published data. Wow! I've impressed myself again[:D]
Best, Joe
W.D
Get a chronograph.