Are those Remington *97 primers like the rem 209-4 primers for 410ga?
I am not familiar with that term ( *97 ). :oops:
I know that the Winchesters are hotter primers than the regular CCI's, and believe even the reg Remington 209's.
In the past, a lot of talk about cooler primers allegedly giving better accuracy. Are you thinking of any possible connection?
Oh, how do those T/C Shockwaves load for you?