I would like to check the cylinder mouths on my .357 (S&W, Ruger OM Blackhawk, Ruger GP100) and .44 (Ruger OM Flat-top) revolvers before updating my cast bullet sizing dies.
Rather than buying one (or 2) large sets, would anyone happen to know which selection of pin gauges I should buy? And can you verify that I should get the "minus" gauges?
Thank you,
Richard