Yes I have done that with no significant difference between the two lots. But, I was using them for casual practice, not competition.
Some match shooters like to stay with the same mfg for their practice brass as their competition brass. They say the slight differences between their competition brass and other mfg brass throws them off during practice.
If you don't shoot competition, and you intend to use the brass for practice, then you shouldn't have to worry about using a mixed bag. I've been doing that for years without a worry.
[This message has been edited by feedramp (edited 11-14-2001).]
In match grade rifles, sorting brass provides perhaps one to two minute of angle improvement in ammunition consistency. In the .45, if it makes that much difference, which I doubt, that would be 1/4 to 1/2 inch at 25 yards.
I wish I had back all the time I spent sorting .45 brass over the years before I learned better.
The top dogs in Bullseye will sort brass and stick with a brand and lot. But to the other 99% of us, it makes no difference.
For accuracy, I have found no real difference at 25 yards. Velocity wise I have found a big difference. Internal case capacity is my guess.
For big IPSC matches, I will use the same brand (once fired) to avoid any surprises at the chrono. Unless it’s a Paul Miller lost brass match, then I take all my crap brass and Blazer I have collected.
The only sorting I do is to throw away all AMERC brass.