sublimaze41
Member
I have a question and would welcome any feed back. I am trying to have a reasonable expectation of FPS with 55 FMJ w/can and H322 powder, I will be shooting it out of a Colt M4 (civilian version w/ 14.5 inch barrel AND muzzle BREAK)
I have 8 pounds of H322 and thousands of Hornady bullets. I went to the range and chronographed some. The last load is the one I will mention. I loaded 23.4 grains of H322 in once fired .223 case with win primers and seated to a depth of 2.210. The string average was 3011 FPS.
I wanted to load as close to military ball as I could using existing components. Is this unreasonable? Does the shorter carbine barrel contribute loss of speed? Is the powder or seating depth to blame? Am I really at the point where it doesn't matter? Is there room for load increase past 24 grains? Is working pressure higher in 5.56 versus .223 and thus I have room to go up on my load? Should I just be satisfied with 3,000 FPS with a 55grainer in an AR.
Thanks in advance. I would love to have some opinionated responses. I have learned a whole bunch here and it's nice learning this way versus the "school of hard knocks."
I have 8 pounds of H322 and thousands of Hornady bullets. I went to the range and chronographed some. The last load is the one I will mention. I loaded 23.4 grains of H322 in once fired .223 case with win primers and seated to a depth of 2.210. The string average was 3011 FPS.
I wanted to load as close to military ball as I could using existing components. Is this unreasonable? Does the shorter carbine barrel contribute loss of speed? Is the powder or seating depth to blame? Am I really at the point where it doesn't matter? Is there room for load increase past 24 grains? Is working pressure higher in 5.56 versus .223 and thus I have room to go up on my load? Should I just be satisfied with 3,000 FPS with a 55grainer in an AR.
Thanks in advance. I would love to have some opinionated responses. I have learned a whole bunch here and it's nice learning this way versus the "school of hard knocks."