bdgackle
06-21-2011, 04:08 PM
I'm casting for a Ruger GP-100. I slugged the bore and chamber mouths. Grooves look to be about .357, chamber mouths are .358-.359. Boolits as cast are .361-.362.
From searching the forum, I've come to believe that the ideal situation would be to size down to .359 (to match the chamber mouths), but for the moment I don't have a sizing die at that size (or anything close for that matter). I can order a die, but I'm tempted to try to shoot as cast before I go through the trouble, just to see if I really need one.
I know chambering problems are a possibility, but I'll load a couple of dummies to check on that. If that pans out, can I get away with pan lubing and shooting as cast, given the measurements above? Any safety issues (for me or the gun)? If I experience leading, is this a likely cause?
Thanks!
From searching the forum, I've come to believe that the ideal situation would be to size down to .359 (to match the chamber mouths), but for the moment I don't have a sizing die at that size (or anything close for that matter). I can order a die, but I'm tempted to try to shoot as cast before I go through the trouble, just to see if I really need one.
I know chambering problems are a possibility, but I'll load a couple of dummies to check on that. If that pans out, can I get away with pan lubing and shooting as cast, given the measurements above? Any safety issues (for me or the gun)? If I experience leading, is this a likely cause?
Thanks!