I know rule of thumb is to size boolits .001 over for best accuracy and no leading...which is the size I have gone by on every application untill I measured a bore yesterday. My vaquero cylinders all measured .451 and the slug I thought measured .451 but when I measured around it in several spots I had two measurements of .450 and .4505...so the barrel is .0005 smaller than the cylinder. I plan on sizing the boolits at .451 and trying it out before I contemplate sending the cylinder in to be reamed out. I feel .452 would be way too tight...the boolits would have to be pounded through the back side of the cylinders to fit. I would assume this would cause tons of pressure and eventually grenade my revolver like the horror pics posted all over the net with pistols blowing apart.
My question is has or dose anyone shoot boolits sized at .0005 (less than .001) over with descent accuracy and no leading? My boolits are pc and are 50/50 coww and pure mix w/2% pewter.
I'm sure there are other posters that have less than purfect cylinders and chamber sizes that have had similar experiences. I'd like to hear both good and bad. Thanks