Short Mags.com is one place; however, if you are making the fur fly and not punching holes, 180gr is about optimum. For custom rifles with accurized actions, N560 is optimum for 220 gr which is as big as it is prudent to go. Bencrest Central has "Blaine" who shoots this combo and wins 1,000yd LG matches. Best wishes, Overbore /ubbthreads/images/graemlins/wink.gif