.270
my heavy bl .270 win shoots just great. i get 2 1/8 in five shot groups at 500 meter,s sst 23 in tube, tub lug ,speed lock pin and spring, bell&carlson stk. and i even had it fluted on a rem 700 and iv won more than my fair share of match,s. sniper and siloette. my last hunter bench rest i shot a 49 out of 50. useing bulk remington 130 gr bullets. the sad part was that after building this rifle remington started to make the sendero in .270 and ive shot agianst some of then and the shoot allmost as well. i never felt like i needed match bullets. but i still have some 135 gr sierra,s. my personal fav is the sierra 130 gr spbt sk#1820 . since retiring this rifle from hunting i had to find a .270 and i replaced it with a sako trgs in.270 i killed lots of nusance bear, deer, etc,etc,. i have much larger cal,s like 308 norm mag, trgs in 30-378 etc but they just are not the same . the nice part i like with the bears is no shoot throw,s so if its in the kitchen, liveing room or inside a store theres no more damage. just drag them out and throw them in the bear trap out side that they refuse to go into .