AE XM193 for practice and hornady223 75 for defense

[platinumdude]

Is this bad if I primary use American Eagle 5.56 55 grain FMJ for practice and then use Hornady .223 75 grain TAP for defense? I heard the different grain weights can throw off the sight settings.

I would use the practice ammo for WTSHTF scenarios and also at my indoor range that can't be steal.

[thmpr]

50 yards or less.... No but 100 yards and further yes. You will see around 2"-3" diff POI at 100 yards.