Mabye they use better bullets since its Fiochhi, but generally speaking if you shoot 10 shot groups with most any FMJ, you will find 6 to 7 in a group and the rest fliers.
I"m assuming you are talking at least 10 or more 5 shot groups at 100 yards in your claim. Thats a pretty tough average. .75 inches at 100.
That being said the point is that almost all FMJ projectiles, not the ammo itself, but the projectiles are below par for accuracy.
Pull the 55s out of ball ammo, resize the neck, and seat a 52 bthp, and you'll get amazingly better groups typically.
I"m talking about long averages. Not just a couple of groups for both instances...
Best I've ever seen FMJ do was when a friend weight sorted 62s and reloaded the bullets...with weighed powder... worked yes, would average around MOA, not any better. Thats the best I've seen ever.
And I've shot a fair bit with the AR over many years to say the least.
