10mm Auto Rim anyone???

RJM52 · May 03 2018 07:21:23 PM MDT

Would you like to see a 10mm Auto Rim???

If so please let Starline know and if enough people ask and state how much they would buy who knows...they are now making .41 Special aren't they...and there are not even any dedicated .41 Special revolvers commercially made...just customs.

https://www.starlinebrass.com/about-us/contact-us.cfm

Just click on Select One and put in New Cartridge Suggestion...

Thanks...Bob

The_Shadow · May 03 2018 07:42:51 PM MDT

I had contacted Starline about making a 9x25 head stamped brass previously. Their response was that for a price they would make it even with a personal headstamp... ${$default_cool_smiley}$

TonyRumore · May 04 2018 09:20:47 AM MDT

The case may get drawn long enough to get Herter's .401 PowerMag brass. That will be a hot seller. ${$default_cheesy_smiley}$

RJM52 · May 06 2018 01:42:06 PM MDT

From what the guy who had the first run of .41 Special brass made about 10 years ago said it was 55K pieces plus the cost of a headstamp die.

Rick R · May 06 2018 04:03:47 PM MDT

Don't forget you may need to convince Hornady, RCBS, Lee or somebody to make a shell holder to fit.

That said 10mm Auto Rim brass would probably lead me to buy a GP-100...

SHOOT1SAM · June 24 2018 10:02:25 PM MDT

Quote from: The_Shadow on May 03 2018 07:42:51 PM MDT
I had contacted Starline about making a 9x25 head stamped brass previously. Their response was that for a price they would make it even with a personal headstamp... ${$default_cool_smiley}$

Done.

Sam

Captain O · August 16 2018 07:30:17 PM MDT

The concept is good but I would prefer to have a Charter Arms extraction/ejection system. Charter Arms is now selling .41 Magnum Revolvers under the Mag Pug moniker. It weighs 23 ounces and is a beast!

Grenadier · August 16 2018 08:01:44 PM MDT

Why not just use full moon clips? I had a Smith & Wesson M1917 and later a Model 1955, both in .45ACP. The auto rim cartridges were a drag. I stuck to using full moon clips and they worked great. If I had a 10mm revolver that's what I would want to use, moon clips

REM1875 · August 25 2018 10:41:45 AM MDT

Since the parent case is the 30 Rem, the twin rimmed version is the 30-30......... cut down down and stuffed was what I was working on .......30-30 has a large rim and may or may not fit in your 6 gun.......I haven't tried my RedHawk yet.....
Your mileage may very ...... ${$default_laugh_smiley}$

GarrettJ · November 29 2019 05:48:53 PM MST

Sorry for resurrecting an old thread, but it was interesting to me. I shoot 10mm through a Blackhawk, and I can't see where rimmed brass would make any difference in a single-action revolver vs. the typical rimless brass. But it seems interesting nonetheless.

So I started messing around a little. I found that chopping a .30-30 case to the correct length did indeed produce something of the correct diameter that would drop into my cylinder with no issue. I find the .30-30 also has a rim diameter very close to the .45 Colt, which means they will all fit in the cylinder without interfering with eachother. (yes, I chopped 6 of these and tried it out).

The one real issue is that cutting down .30-30 rifle cases results in a rimmed pistol case with a case wall thickness at the neck of around .025" thick. Regular 10mm brass is only around .010" thick at the neck. Attempting to bell the neck and seat a bullet did not turn out very well. It will be necessary to turn the case necks.

I don't have a neck turning tool for my RCBS trimmer, but I've been looking for an excuse for a while now so I went ahead and ordered one. Unfortunately this will only let me trim the OD of the neck. RCBS makes an ID boring tool, but they are caliber-specific, and only go up to as large a .375". So I'll have to see what it looks like if I turn the OD of the neck.

More to come...

sqlbullet · December 01 2019 07:18:59 PM MST

Curious to see how this works out. I would try it too, but doubt it will work.

woods_walker · December 01 2019 11:21:48 PM MST

I am totally baffled as to why anybody would be doing this. I have auto pistols that chamber and feed the 10mm Auto cartridge just fine. I have revolvers in 10mm that do the same thing just as reliably. So why is this needed?

I bought a Smith & Wesson Model 610 in 1991. I still shoot it. I use moon clips. They work great.
I can honestly tell you that in all these years of being in a network of fellow 10mm collectors and shooters, I have never heard anybody say,"You know, I need some 10mm rimmed brass." ${$default_grin_smiley}$

sqlbullet · December 02 2019 11:12:08 AM MST

Until now... ${$default_tongue_smiley}$

I had the same reaction when this thread was posted a year and a half ago.

But, there are revolvers in 10mm. Same basic principles that drove the creation of the 45 auto-rim are driving this request. I don't have a 10mm revolver, and I have never had a revolver chambered in a rimless cartridge. I can imagine that moon clips might get old.

jiminthe burg · December 02 2019 03:55:25 PM MST

Love my moon clips and can not imagine now having to load 6 rounds, one at a time. Sure it takes some time loading them before hand but not that much longer than loading magazines. Since I do not have to set up my brass catcher ( it is not that time consuming ) and chase down brass like I did before I made the catcher, it does not take any longer to use the clips and if fact seems to take less time. Have a 610, Gp100, and a 625 and love full moon clips. So for me, I am not interested in ar brass.

woods_walker · December 02 2019 05:25:24 PM MST

Well, jiminthe burg is right- using full or half moon clips takes no more time than using speedloaders. Since the first revolver was chambered in an auto pistol cartridge, it was clearly understood that a properly manufactured cylinder does not need rimmed brass.

This is a case of someone TRYING to find a solution to a problem that doesn't exist. And as a member and lurker on several other forums- some of which are very 10mm focused- I do not remember ever reading any comments about the need for this.

It's sorta like putting a screen door on a submarine. You can, but what does it accomplish?