OK, so for the pistol/rifle, I get it ... load up some cowboy loads on the medium-low side of the powerfactor scale.
What about store bought shotgun shells? I bought some 7 1/2 and 8 bird/target shot at Walmart... is that OK, or is there some special cowboy shotshells I should be looking at?
I can reload metallic cartridges, but have nothing for shotshells.
Thanks!