With some bullets, I notice there is a wider weight variation - and occasionally a little variation in diameter - and it wouldn't surprise me if there was a hardness difference as well. Unfortunately I think it varies more than we would like to think it does from lot to lot.
I used to load a lot of Rainier Ballistics and West Coast bullets - and I was having all kinds of grouping problems that would show up from time to time - and since I switched to Montana Gold my loads are a lot more consistent in terms of performance.
I don't have any specific info on hardness - but it wouldn't surprise me if they were softer - or just a hair bigger in diameter(but in tolerance) - and that's what is causing your issue.
I used to load a lot of Rainier Ballistics and West Coast bullets - and I was having all kinds of grouping problems that would show up from time to time - and since I switched to Montana Gold my loads are a lot more consistent in terms of performance.
I don't have any specific info on hardness - but it wouldn't surprise me if they were softer - or just a hair bigger in diameter(but in tolerance) - and that's what is causing your issue.
