Originally Posted By: Siringo
HUMMMM ---- wonder what Winchester uses in their own 5.56 ammo?

Anyway --- I have found in the 450 Bushmaster and 25 DTI that WSR give me the highest velocities and good accuracy. Rem 7 1/2 give slightly better accuracy for me, but little slower.

I too wonder what Winchesters uses. We know they use their regular SR primer but rumors have a way of creating questions for no reason. THanks for the reality check!!!