Fire forming

[SAC]

Hello,

Just woundering if it is better to fire form your new brass before load testing, or if it doesn't make that much of a differance.

The caliber is .308 factory barrel

Thanks Scott

 

[1000yardstare]

In my 6AI, I never have seen any difference in group size at 300 metres between unformed brass and fireformed brass. There is a velocity difference but any load I have tried shoots sub-moa in either type of case.

But this is a custom barrel with the chamber concentric with the bore. You mentioned a factory barrel so concentricity may be a factor. With some factory barrels it is a roll of the dice as to what you get.