Just slugged it last night, Sal. Bore is .452", groove is .460". I like that boolit, Ed, but for some reason I chose the 405gr 457193. Big meplat on the 400gr 457643 should make it a better hunting boolit.
Thumper generally shoots just a bit over an inch with jacketed bullets it likes, 2.5" is just an encouraging step towards what I hope will be a 1.5" cast boolit load.
Life Member NRA, TSRA
Smokeless powder is a passing fad! -Steve Garbe
I hate rude behavior in a man. I won't tolerate it. -Woodrow F. Call Lonesome Dove
My favorite recipes start out with a handful of used wheelweights.