yup, although I don't run the extended FP, never found them to be necessary. I run Russian primers in my practice ammo, and very seldom have an issue, given that I have had the same issue with heavier sprung guns I don't blame the gun, the primers are only good for practice. With CCI, Federal, the new S&B, I have zero issues, ever, even using an 8.5lb spring in my Steel Challenge gun