Originally Posted by
JFriis
All right, how about some numbers?
Chronograph placed 1' in front of target, target shot at 15'. Both sets were shot offhand, unsupported with a S&W 1911 PD (Commander Length).
Test #1 - Standard brass (Not drilled).
Average bullet weight 22 grains.
Average Velocity - 420 FPS.
5 shot group was right at 2". Would have been 1.5" except for one shot that may or may not have been me.
Test #2 - Brass drilled with 1/8" bit
Average bullet weight 22 grains
Average Velocity - 400 FPS.
5 shot group was right at 1.5".
Both tests had a wide deviation in FPS, =/- 15 fps either side of the average.
A long range test was performed with a single shot at 50 feet. The chronograph had a result of 358 FPS and the shot itself was fairly close to point of aim.
Energy calculations place this at 8ft lbs of force (Not sure what that means, but a 25 ACP is around 50 ft lbs if I recall correctly.)
Most of the recovered bullets were fine except of few that appeared to have shattered after hitting the plywood backstop. 80% recovery rate and 75% of those are reusable.