The Firing Line Forums - View Single Post - Question about the "Shockwave" and short barrels

Bart B. · August 10, 2012, 04:53 PM

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.

August 10, 2012, 04:53 PM	#18
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	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.