Haven't really gonna CRAZY on mag testing it(22-250AI),but thus far I cain't make it bobble. That's with Alpha's,AmericanMag,AICS,OEM Ruger Scouts(poly and steel) and MagPul.
I'd go take a pic,but I'm goin' crazy with the Krunchentickers. The Troy gasblock simmered the 18" BHW Middie right THE fhuqk down and it'll hang Stoner magfed 75 A-Max under 3/4" at 2770fps. Got the ambient temp to bump and run,so will and 2800fps will come easily(because it did with 75 Hornie BTHP's). GOTTA love 2.345" COAL latitude in a S/S coated mag of modest profile!
FINALLY caught a break in the weather and it's 'bout time to skin up a mountain and scour for a Booner..................