tbh , i don’t see how it would help my post trying to sell it , with u saying u never heard of br4 being used .... let me just run down to the local gun shop and pick some up since primers are everywhere. ... your knowledge of primers is prolly correct . But from my first hand experience I’ve used them in my gun for the life of two barrels and was able to carry a single digit SD . And as long as the RO’s where calling impacts..... well I guess my wrong way of doing things was still working out . Thank u tho sir