Fire formed cases

[SAC]

Hello,

Has anyone noticed much differance in group size between a fire formed case to your rifles chamber or new full length sized brass.
The reason I ask, I am in load development and I have new win. brass and once fired black hills brass in my rifle. I have run into it before.

Thanks scott

 

[Jeff3C]

Re: Fire formed cases

If you run it over a chrono I think will see that the fire formed cases are more consistent. Probably not much difference under 300m.