Thanks. Do you know why one uses 250 and the other uses 215?
I just asked a similar question in here about a week ago.
I did a search for this before starting this tread and didn't find yours... Oh well..
I've made a note of which rounds have CCI and which have Federal primers. Other than the difference in numbers (for which I still don't know the meaning), I can't imagine how the primers from two different and equally good manufacturers would give different results.
I do know that changing manufacturers of the same numbered powder CAN have big differences. But how much powder is in a primer??