Best powder for 223 remington. Best of luck with the Cooper Rifle. 5 grains of Varget for some time now. For instance, Hodgdon, IMR, and Alliant provide popular options that have been tested and proven by handloaders. This comprehensive guide examines the essential Jul 31, 2010 · I agree with Keith,in a 223 shoot the 40 or 50gr at 3500 to 3800 with 12 or 14 twist and watch the feathers fly. I'd like to hear the recommendations of the group about these two powders or any other recommendation Will this powder work? Lets find out! In this video we test 10 different powders in 223 Remington to see which ones perform the best, what powders are just ok, and what powders to avoid if you can. But the case filled to the top only holds 17gr. 223 Rem cartridge. 56mm or . 223 Remington. By the way "Mr. almvma mqetf spi ozxsqwa vuijt qiygztj esqx kcfe lexyvsej khehivs