Brian, yes, 1.1's too low a number for barrel time examples; I overlooked that part of Al's site. And yes, most bullets exit someplace near the "hump' of the muzzle axis angular peak; some before and some after. The frequency of the barrel's whip cycle is pretty low compared to sound/shock speed in stainless steel.
Shock waves in stainless steel at 15000 fps travel 37.5 feet in .0025 seconds. In a 2-foot barrel, I think they'll make a lot more than 3 round trips.
But 3300 fps for a 150 grain bullet from a .30-06? That's a proof load plus!!!!
What's a link to Al's site on that barrel's info? Can't find one searching his web site.
Last edited by Bart B.; August 10, 2012 at 05:08 PM.