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. Quote Share this post Link to post Share on other sites
GLShooter 2,718 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 Quote 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. Quote Share this post Link to post Share on other sites
GLShooter 2,718 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 Quote 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? Quote Share this post Link to post Share on other sites
geepee3 1,001 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 Quote Share this post Link to post Share on other sites
GLShooter 2,718 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 Quote Share this post Link to post Share on other sites
