I keep some of each brand in SR, SRM, LR, LRM. I have encountered "bad" batches, in all brands, that misfired a fair bit, had some when it was the gun's fault too. I am not scared to rework a load with a different primer to see if maybe it'll improve anything, or not. So far, I like RP 6-1/2 on the SR the best, F210M works best in the LR overall, F215M has been pretty consistent. I thought about buying some more CCI BR and WW match LR's, but balking at the prices at present, I don' need them that bad. I likely have plenty to keep me going for a while. I can wait a bit and see if pricing settles down a bit in a couple of yrs. I did buy some S&B's because they were so cheap, good enough for plinking purposes anyway, haven't tried them in anything yet though. And I still have lots of WW LR, CCI LR's and SR's and LRM, RP 9-1/2's to use up if neccessary.