For the life of me, I can't find the thread where someone had great groups and used Federal brass. I started weighing my collection of 9mm and .40 cal range brass, randomly pulling 50 cases and weighing them. This is what I recorded.
Federal .40 cal. 67gr (10%) and 69gr (90%)
Remington. 40cal. 63gr (10%), 64gr (70%), 66gr (20%)
Winchester. 40cal. 67gr (30%), 69gr (70%)
Speer .40cal. 61gr- (5%), 63-64gr(45%), 66-67gr(45%), and 69gr+(5%).
Weight was measured with a HF electronic scale and I tared the scale every 5 measurements, double checked the extreme spreads, and slide the brass around the pan. Not all brass will have this same spread but to me this shows which brass is more consistent in weight. And, if this is an indicator of case volume, the Federal pistol brass here is the most consistent.
I haven't finished weighing Winchester, Remington, and Federal 9mm brass but will post the weights later along with PMC and S&B.
Federal .40 cal. 67gr (10%) and 69gr (90%)
Remington. 40cal. 63gr (10%), 64gr (70%), 66gr (20%)
Winchester. 40cal. 67gr (30%), 69gr (70%)
Speer .40cal. 61gr- (5%), 63-64gr(45%), 66-67gr(45%), and 69gr+(5%).
Weight was measured with a HF electronic scale and I tared the scale every 5 measurements, double checked the extreme spreads, and slide the brass around the pan. Not all brass will have this same spread but to me this shows which brass is more consistent in weight. And, if this is an indicator of case volume, the Federal pistol brass here is the most consistent.
I haven't finished weighing Winchester, Remington, and Federal 9mm brass but will post the weights later along with PMC and S&B.