i have 4 rifle calibers between multiple rifles they are 30-30, .308, 5.56, and 7.62x39 no need to overcomplicate it theyll all do the same thing if i put it in the right place. people fall for all that marketing BS 1,000 yard ,1,200 yard, ballistic coefficient..... 95% dont even know what it means but it sounds cool even though you wont ever shoot it past 200