ToddMNicoll 1 Posted October 5, 2016 At what range does the 6x45 exceed 5.56 in performance? I've only seen data to 300 yards. Share this post Link to post Share on other sites
GLShooter 2,494 Posted October 5, 2016 At what range does the 6x45 exceed 5.56 in performance? I've only seen data to 300 yards. From muzzle to what ever distance you shoot with the right bullets.. Greg 1 Share this post Link to post Share on other sites
ToddMNicoll 1 Posted October 7, 2016 Sorry, I should have been more specific. I meant in the higher BC bullets. Say, 95 gr SMK vs 77 gr SMK in 5.56. Share this post Link to post Share on other sites
GLShooter 2,494 Posted October 7, 2016 Sorry, I should have been more specific. I meant in the higher BC bullets. Say, 95 gr SMK vs 77 gr SMK in 5.56. You can run the numbers through JBM based on your local conditions. 95 SMK is around 0.490 and the 77 SMK is right on 0.372. Obviosly your anticipated launch speeds will control this. Greg Share this post Link to post Share on other sites
ToddMNicoll 1 Posted October 8, 2016 I'm not familliar with JBM. What is this? Share this post Link to post Share on other sites
geepee3 979 Posted October 8, 2016 I'm not familliar with JBM. What is this? JBM Ballistics offers free ballistic calculators and other resources. Here's the link; http://www.jbmballistics.com Glenn Share this post Link to post Share on other sites
GLShooter 2,494 Posted October 8, 2016 More darn tables and reference material than any place on the net that I have seen or used short of my brain. Greg Share this post Link to post Share on other sites
