Originally Posted By: steve garrettwhat powder should yield the fastest speed loaded in 223 with a 55 grain bullet. The 223 is only rated at 55k psi, I want to load to nato spec of 62k at least.
As per quickload - loaded to 62,000 PSI and a 24" barrel, 55gr Hornady vmax :
Reloader 10x 23.4grs - 3371 fps
H4198 22.1grs - 3280 fps
H322 24.6grs - 3391 fps
Benchmark 24.9grs - 3300 fps
H335 26.0grs - 3380 fps
IMR 8208xbr 25.7grs - 3350 fps
CFE223 28.3grs - 3400 fps
