I had in my head that 10mm was a semi-auto caliber. Now I'm hearing they make 10mm revolvers. How does a 0.39" revolver differ from a 0.41" revolver? Doesn't seem like there would be a market for both. I'm a 41 Mag fan, and was thinking of buying a 10mm semi-auto. I have no interest in a 10mm revolver.

Well SAAMI spec is actually .4005 so less than .01 of an inch and about 150-200 fps for comparable bullet weights in favor of the the 41 mag.

Ruger makes all sorts of stupid guns; they make 9mm revolvers, too.

I presume they're made for people who have don't like magnum rounds or just prefer to use the same round in both types of handguns.

George

The 10mm could be considered a .41 Mag Light. It can come close but it definitely is not a .41 Mag. OTOH, a Glock 10 will spit out 16 bullets in a hurry. I certainly wouldn't consider myself undergunned, appropriately loaded, with a 10 for anything in Texas.

The 10mm is not a 41 mag. The 10mm ballistics are mor in line with a 357 mag. Although, with the heaviest loads I prefer the recoil from a 10 mm in an auto loader.

For the evidence of my position, if you look atthe full loaded boutique companies such as buffalo bore and underwood the 10mm does 1350 with 180 grain loads from 5 inch barrels. The 357 does 1400 FPS from 61/2 inch recovers (remember the cylinder gap).

The 41 mag from a 61/2 inch revolver from those same companies gets 1500 FPS for the same 180 grain bullet.

The 41 mag gets 1350 with 220 plus grain bullets (when I say plus I mean 265 grains) while the 10mm will get you to 1100 with the 220s.

I love the 10mm, but when folks talk about Norma loads, Norma loads were 1250 in 180 and 1200 in 200 grains respectfully. Great numbers but even federal loads 357 180 grain load that gets you there. Again, I prefer the recoil of a 5 inch 10mm than a Ruger black hawk in either real 357 or these 41 mag rounds.

Ruger made single action 10mm black hawk revolver with change out 40 sw cylinder. SW made a N frame 610 in 10mm and did not advise against the use of 40sw in the 610.

Those 610 run 1800 to 2000 on gunbroker. I have not priced a black hawk 10mm in a long time.

I hope this helps. To summarize, top end 10mm gets you top end 357 mag in auto platform. The 41 mag is another full step up.

Be aware that 10mm Mag cartridges are very different from 10mm auto cartridges! I don't know what the ballistics are for 10Mag but the case length is nearly as long as the 41Mag. I think they tried to reinvent the wheel with this cartridge but it is still somewhat a free country. I have read about a guy that shortened 375Win cases and wilcatted a 10mm Rimmed Magnum that he has shot from a 12" barreled single shot handgun with a 200 grain bullet achieving 1545 ft/sec., but I think the 41Mag is capable of that and possibly more. My 41Mag Ruger Blackhawk with 6.5" barrel gets 1335 ft/sec with a 210 grain bullet and that is not pushing the envelope but is what I consider a full power hunting load.

Mr. Lucky is 100 percent right. The revolvers I identified are chambered for the 10mm auto round of Bren 10 fame as well as numbers for clarification:

The problem with .41 Magnum as a PRACTICAL revolver was there was no .41 Special LENGTH case. A Model 29 was quicker to speedload with .44 Special than a Model 57 with .41 Magnum. And that was what I found as an owner of both in the late 1970s. What the .41 Magnum needed wasn't the "Police Load" BUT the "Police Load" in a Special length case instead of a Magnum length case.