Matt Dillon
Member
I can't find any powders for loading .223, such as H335 or Tac ( 2 powders that I have previously used).i do have an 8 pound jug of IMR4064 that o use for the 7.5Swiss cartridge. Sierra list a few loads for IMR4064 for .223 with 55 grain projectiles, but I am concerned about gas port reassure in an AR15'. Does anyone have experience with this combination in an AR15? Thanks in advance for your help!