MikeS
10-07-2011, 02:53 AM
Hi All.
I just got a pin gauge set I bought a couple of days ago, so I thought I would use it to check all the throats on my revolvers. Well, I got some surprise sizes, and wanted to ask for advice. I have 3 revolvers that shoot 45LC, so I started with them. The first one is a Cimmaron Thunderer I had rebarreled to 45LC from 44Spec. The gunsmith I had do the job told me the throats were 'fine for using .452 sized boolits', and the 45LC cylinder throats measured at .454, and the 45ACP cylinder measured at .452 The bore diameter is .439 Next up is a RBH and it's cylinders measured at .450!! with a .443 bore with .001 of thread choke at the threads. The last one is a ROA with a Taylor's 45LC cylinder. The throats measured .452 and the bore is .442
I know I need to get the RBH's cylinder reamed out, just not sure what size I should ream it to. The first option is to ream it to .454, and then also ream the ROA to .454 as well, and then get a new sizing die for my lubesizer. Or I could ream it to .452 and see if the gunsmith has a cylinder for my Thunderer that has .452 throats, and then be standardized on .452 for all my 45 boolits, so I can load the same boolits in either my 1911, or any of the revolvers. I would rather stay with .452 and was wondering, if the gunsmith doesn't have a different cylinder that has .452 throats, how bad would it be to shoot boolits sized to .452 with .454 throats? I've only shot this gun once so far, and I put slightly more than 50 rounds thru it, with no leading using boolits cast from Lyman #2 sized to .452 I also shot about the same number of boolits from the Rugers too, and neither of them seems to be leaded, any dirt in the barrels came out with a couple of passes with a boresnake after shooting. As all 3 guns had different bore sizes, what size is a 45 bore supposed be?
I did the same measurements on 2 Model 60 Smith & Wesson revolvers, both bores were .345, but one of them had .002 thread choke, while the other didn't have any choke at all. One had cylinders of .356, and the other is .355, again what is the proper bore size for a 38Spec? Neither Smith is probably going to be shooting lead boolits, so I don't think I need to worry about them (they're my mother's guns, thats why no lead). Thanks!
PS I didn't slug any of the bores yet, just used the pin gauges, so don't know the exact groove diameter of any of them.
I just got a pin gauge set I bought a couple of days ago, so I thought I would use it to check all the throats on my revolvers. Well, I got some surprise sizes, and wanted to ask for advice. I have 3 revolvers that shoot 45LC, so I started with them. The first one is a Cimmaron Thunderer I had rebarreled to 45LC from 44Spec. The gunsmith I had do the job told me the throats were 'fine for using .452 sized boolits', and the 45LC cylinder throats measured at .454, and the 45ACP cylinder measured at .452 The bore diameter is .439 Next up is a RBH and it's cylinders measured at .450!! with a .443 bore with .001 of thread choke at the threads. The last one is a ROA with a Taylor's 45LC cylinder. The throats measured .452 and the bore is .442
I know I need to get the RBH's cylinder reamed out, just not sure what size I should ream it to. The first option is to ream it to .454, and then also ream the ROA to .454 as well, and then get a new sizing die for my lubesizer. Or I could ream it to .452 and see if the gunsmith has a cylinder for my Thunderer that has .452 throats, and then be standardized on .452 for all my 45 boolits, so I can load the same boolits in either my 1911, or any of the revolvers. I would rather stay with .452 and was wondering, if the gunsmith doesn't have a different cylinder that has .452 throats, how bad would it be to shoot boolits sized to .452 with .454 throats? I've only shot this gun once so far, and I put slightly more than 50 rounds thru it, with no leading using boolits cast from Lyman #2 sized to .452 I also shot about the same number of boolits from the Rugers too, and neither of them seems to be leaded, any dirt in the barrels came out with a couple of passes with a boresnake after shooting. As all 3 guns had different bore sizes, what size is a 45 bore supposed be?
I did the same measurements on 2 Model 60 Smith & Wesson revolvers, both bores were .345, but one of them had .002 thread choke, while the other didn't have any choke at all. One had cylinders of .356, and the other is .355, again what is the proper bore size for a 38Spec? Neither Smith is probably going to be shooting lead boolits, so I don't think I need to worry about them (they're my mother's guns, thats why no lead). Thanks!
PS I didn't slug any of the bores yet, just used the pin gauges, so don't know the exact groove diameter of any of them.