Need to buy ammo. My rifle likes .223 better than 5.56. Should I take the velocity hit, or the accuracy hit?
16" Criterion .223 wylde Hybrid. Purpose is GPR AR-15 stuff and is to shoot affordable factory ammo in the $0.75/rd range when I'm running low on 6.5CM ELD-M for my bolt gun, with minute of steel silhouette accuracy out to maybe 700y, I would say no further based on my experience with heavier, more setup for accuracy, .223 AR's that make me feel like the caliber poops out by then. I know better ammo exists, but at $1/rd I feel like I would be better served switching calibers.
Rifle groups about 1.5MOA or less with FGMM as a baseline test. It hates 68 gr Frontier 5.56 and 77gr TMK Bone Frog, and TMK AAC. Frontier 68gr .223 pressure gives 1.25-1.8 MOA average though, consistently under 2MOA with multiple tests. Frontier 75gr is 2MOA on a good day, with average groupings a bit higher 2.25-2.5MOA.
So would you go with the more accurate .223 loading and lose the velocity (I see chrono results of like 2640 for the 58gr .223) or go for the hot loaded 5.56?