Hot-Rodding 7.65 Para

nukem556 · 07-26-2011, 08:57 PM

There's a can of worms...the old canard about "overstabilizing' a bullet...I dont think it can happen in the real world. Understabilzation with too slow a twist is very apparent....bullets keyholing and hitting a target (if at all) sideways. I've been a Service rifle shooter for years, mainly using a AR15 with one of Kreigers excellent barrels in a 1/7 twist. This is to stabilize the long 80gr bullet for the 600yd stages. For reduced 100-200 yard matches, I've shot zillions of 52gr bullets through the same barrel with knife-edge 1/2 MOA accuracy....mind you, a 52-55gr bullet only requires a 1/14 twist to stabilize, so they're spinning TWICE as fast as designed! The incremental increase of bullet rpm say from 1200 fps to 1400fps is negligible, as is the effect on accuracy.

07-26-2011, 08:57 PM	#6
nukem556 User Join Date: Jul 2010 Location: Irmo, SC Posts: 625 Thanks: 35 Thanked 168 Times in 107 Posts	There's a can of worms...the old canard about "overstabilizing' a bullet...I dont think it can happen in the real world. Understabilzation with too slow a twist is very apparent....bullets keyholing and hitting a target (if at all) sideways. I've been a Service rifle shooter for years, mainly using a AR15 with one of Kreigers excellent barrels in a 1/7 twist. This is to stabilize the long 80gr bullet for the 600yd stages. For reduced 100-200 yard matches, I've shot zillions of 52gr bullets through the same barrel with knife-edge 1/2 MOA accuracy....mind you, a 52-55gr bullet only requires a 1/14 twist to stabilize, so they're spinning TWICE as fast as designed! The incremental increase of bullet rpm say from 1200 fps to 1400fps is negligible, as is the effect on accuracy.