mayguy
(less blowback in primer pocket)
The point being with the 25 ACP there is no blow back - doesn't even stain the shell casing. The Vari-flame is nothing more that a small rifle primer in a shot shell battery cup - you will get blow by...
I use Remington 209-4 primers - primers made for the 410 shot gun they have less flame than the 777 primers - but I still deposit soot in the breach area - I really do not think I am getting blow-back from the main charge.