Anyone ever use Federal Shorty Shotshells?

[Tennessee Dave]

Mr. Hillis, Thanks for that information. I will look for some low-pressure shells in 2-3/4.

[Drew Hause]

Several sources for B&P CompOne are listed here
https://www.shotgunworld.com/threads.../#post-4995555

7/8 oz runs about 5800 psi
1 oz about 6500 psi