Never noticed much difference shooting pistols, but sighting in a AR15 carbine in .45ACP recently I noticed something that surprised me. I was using a DeltaPoint optic at 50 yards rested. With my fifty-something year old eyes I was getting 2” groups with the Federal ammunition, and 4” groups with the Winchester ammo. I know these both are low cost range ammo, but didn’t think they would perform so differently. I know this could just be the preference of this gun, but has anyone else noticed an accuracy difference in these two?