What is the difference between the RP-12 and the SP-12 wad? Just wondering if they are interchangeable in reloads? Thanks Daniel
Also the petels are only slit about 1/2 down the shot cup of the sp12. I prefer the rp12 i always got better patterns with them.
Used a ton of both. RP 12 tends to be for 11/2 or 13/8 payload. SP12 was usually for 11/4 . I am getting old but that’s what I remember.