I'm not a big experimenter and shoot only 55 grain FMJBT bullets but I can see and feel a significant performance difference with my 16" carbine AR when shooting my reloads compared to inexpensive factory ammo like PMC Bronze.
The factory stuff shoots OK but costs upwards of $.35 a round.
My reloads, 55 gr Hornaday FMJBT on top of 25.8 grains of Varget costs $.23 a round and shoots noticeably better. The hotter rounds also eject differently, forward of the muzzle at 1 o'clock or so while the cheaper stuff ends up at 3 o'clock.
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