RMC Square Drive Revolver Nipples

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arcticap

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This may be old news to some but RMC has invented square drive revolver nipples along with a square drive nipple wrench that will fit many popular Pietta and Uberti revolver models.
It's certainly an interesting innovation by an American manufacturer that some folks might find useful.

https://rmcoxyoke.com/product/square-drive-nipples-with-square-drive-wrench/

"New Square Drive revolver nipples for Uberti and Pietta blackpowder revolvers.
Provide a secure fit with the Square Nipple Wrench, helps to prevent stripping of the nipples when removing.
Includes six nipples and one wrench. Wrench and nipples also sold separately.

Available with M6 x .75mm threads for Pietta revolvers, models: Paterson, 1851 Navy, 1860 Army, 1861 Navy, 1858 Remington, Dance Navy, Spiller & Burr, and Starr.

Available with 12 x 28 UNF threads for Uberti revolvers, models: 1851 Navy, Baby Dragoon, 1849 Pocket, Wells Fargo, 1860 Army, 1861 Navy, 1862 Pocket Police & Navy, 1858 Remington, 1858 Remington Carbine, and 1873 Black Powder Cattleman."
 
They make some great quality stainless nipples. Unfortunately they are so small/thin that they dont fit store bought percussion caps....not even the CCI 10s...which are the closest fitting caps but still loose and dont grip the nipples taper. But they work great for home made percussion caps and they fit them perfectly. I have about half a dozen sets. The stainless steel they use is pretty darn hard too.
 
Yeah i do that with stock pietta cones/nipples....these have such a steep taper it cant be done without going very low and they have a high "shoulder" that gets in the way. I tried very hard to get these to work for remington and cci caps, closest i got was cci 10s and even then i still had to pinch the cap a bit. I prefer not to pinch caps...i dont think its bad but i just dont prefer it as i use a capper and have ran into issues. But dont get me wrong...they are very good quality, just wish they changed the dimentions to fit remington and cci caps. For now i will keep using them on my homemade caps as they are worth the money. I also do like the pietta stainless nipples for 20 bux...they can be ground to fit caps if needed and can even have a vent hole put in just like slixshot caps...and theyll work just as good.
 
Mr.midland man, they are of very good quality stainless steel but they onky fit cci 10s. Other caps fit loose and fall off and shortening the cone isnt much of a fix due to the taper being so steep and the shoulders being tall. I personally own about 4 or 5 sets and i only use them for homemade percussion caps that fit very well on these nipples and on stock pietta nipples (to give you an idea of their size they are smaller and have less of a taper than stock pietta nipples). They clean very easy and are of very hard stainless steel and i recommend them ONLY for homemade caps made with the cap maker from "22 reloader company" and CCI #10 caps.
 
Many thanks to TheOutlawKid for his valuable information for consumers and to the THR database.
We're fortunate to be able to benefit from his experience with these nipples before folks buy any.
TheOutlawKid, is it possible to show a photo of how tall the shoulder of these square drive nipples are compared to a standard nipple?
The RMC website doesn't show a close up photo of them and I'm curious to see what they look like close up.

Besides fitting homemade caps, it seems that the only way that they will work is if a person doesn't mind pinching each cap as they load which would mean not being able to use a capper.
I realize that pinching caps is not recommended due to the increased potential for chain fire, but many people pinch them if they end up using # 11's because that's all they have.
But many people who end up buying CCI # 10's may not have a use for them if they don't fit their current nipples either and don't want to modify them.

So my question is, are these nipples too small for caps besides CCI #10's to stay on if they are pinched?
Do you think that #11's will stay on if pinched?
I realize that TheOutlawKid may not know first hand if he doesn't like to pinch caps, but I still would like his opinion if he thinks that these nipples would work or not.

Needing to pinch caps is a negative for most folks.
A person could just as easily be more careful when they install their nipples by using grease or anti-seize on the threads, using less torque and cleaning them regularly enough to not become stuck in the first place.
But for those who want a nipple that's small enough to fit almost every cap on the planet and won't ruin soft wrenches, perhaps they have an advantage in that dept.

One would think that RMC would have made the cones large enough to allow people to grind them down to fit the cap brand of their choice.
 
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Mr.articap yes i will post pics for you all as soon as i get home from work. So pics should be available this afternoon or tonight. And #11 caps, if pinched, will fit these nipples...i have done so without negative effect i.e. chainfires etc. I will post pics of the nipples on and off the gun and in comparison to stock pietta and slixshot nipples.
 
Mr.midland man, they are of very good quality stainless steel but they onky fit cci 10s. Other caps fit loose and fall off and shortening the cone isnt much of a fix due to the taper being so steep and the shoulders being tall. I personally own about 4 or 5 sets and i only use them for homemade percussion caps that fit very well on these nipples and on stock pietta nipples (to give you an idea of their size they are smaller and have less of a taper than stock pietta nipples). They clean very easy and are of very hard stainless steel and i recommend them ONLY for homemade caps made with the cap maker from "22 reloader company" and CCI #10 caps.
also one other question is the flash hole on the end of these nipples are they smaller than the stock pietta nipples as I have two 1851 navy's 36c and I love these two pistols so if the flash holes are smaller that will be better when I'm using max loads so I won't be blowing the hammers back and caps getting into the actions?
 
Here are the pics...i dont remember where i placed the RMC square drive nipples (i think theyre on a 1861 navy i lent to my neices husband to try out) but i have the RMC regular nipples that have the exact same dimentions only that its shoulder is regular instead of square. Here are the RMC nipples compared to Slixshot and a pietta stock nipple..
20200112_190624.jpg 20200112_190554.jpg 20200112_190123.jpg 20200112_190637.jpg 20200112_190813.jpg
Notice how the combustion chamber is a lot smaller on the RMC than the others and Slixshots have largest. I actually tried opening up the combustion chamber with a reamer but the stainless steel of the nipples was very hard and i couldn't ream them without dulling the reamer and breaking a drill bit. Pretty hard stuff. Also notice how they vary in size. I know its hard to tell but believe me when i say the the taper is smaller and steeper and they onkt fit CCI #10s snuggly while remingtons and cci 11s are very loose and just fall off unless pinched. Without pinching the caps they will literally just slide and fall off if you point the gun up. Here are pics showing how high the shoulders are when installed on a cylinder. The left nipple is a stock pietta and the nipple to the left is an RMC.
20200112_191109.jpg
This last pic is only RMC nipples installed on a cylinder. As far as vent hole they are pretty much about the same size as stock pietta...i havent had any blowback issues though but i use stock main springs yet have a light hammer pull and light trigger pull by customizing my guns with my own custom setup consisting of removing the flat steel sear/bolt and trigger spring completely and making my own custom wire spring setup. Its indestructible and i can pull my hammers back all day long for weeks on end and not break anything internally.
20200112_191006.jpg
 
Here are the pics...i dont remember where i placed the RMC square drive nipples (i think theyre on a 1861 navy i lent to my neices husband to try out) but i have the RMC regular nipples that have the exact same dimentions only that its shoulder is regular instead of square. Here are the RMC nipples compared to Slixshot and a pietta stock nipple..
View attachment 884118 View attachment 884117 View attachment 884116 View attachment 884115 View attachment 884114
Notice how the combustion chamber is a lot smaller on the RMC than the others and Slixshots have largest. I actually tried opening up the combustion chamber with a reamer but the stainless steel of the nipples was very hard and i couldn't ream them without dulling the reamer and breaking a drill bit. Pretty hard stuff. Also notice how they vary in size. I know its hard to tell but believe me when i say the the taper is smaller and steeper and they onkt fit CCI #10s snuggly while remingtons and cci 11s are very loose and just fall off unless pinched. Without pinching the caps they will literally just slide and fall off if you point the gun up. Here are pics showing how high the shoulders are when installed on a cylinder. The left nipple is a stock pietta and the nipple to the left is an RMC.
View attachment 884127
This last pic is only RMC nipples installed on a cylinder. As far as vent hole they are pretty much about the same size as stock pietta...i havent had any blowback issues though but i use stock main springs yet have a light hammer pull and light trigger pull by customizing my guns with my own custom setup consisting of removing the flat steel sear/bolt and trigger spring completely and making my own custom wire spring setup. Its indestructible and i can pull my hammers back all day long for weeks on end and not break anything internally.
View attachment 884128
thanks for taking the time to show us the difference in the these nipples as now I am more interested in getting setup to change to the squaredrive nipples as I like the strength bein they have a square shoulder to lock onto when removing/installing these nipples! as far as the flash holes not or very little difference so but yeah I was planning on this summer getting that tap-o-cap tool from 22 reloader to make my own caps so this will be great in the long run! ;)
 
Mr.midland man, if you are going to make your own caps then lemme know and ill help u with a better priming formula than the one provided by "22 reloader". U can use their kit but i can give u directions on how to improve it. Its similar to the old H-48 primer but adjusted for long life etc. I can even show u a better way to use roll caps if you wanna go that route too. I did a write up somewhere...ill looking for it and send it to u if ur interested
 
Oh yeah! Also forgot to mention that the RMC nipples threading is a little rough, they arent as "smooth" screwing into the cylinder as are slixshots or even stock nipples. They tend to have tight spots etc....so have patience screwing them in place and dont force it or you can strip threading etc. I find that when i hit a tight spot all i need to do is apply even downward pressure and screw in/out. I have yet to strip a thread but sometimes i worry. So use a good grease or lube of some kind for the threads and maybe run the thread area between some sandpaper to kinda smooth it out.
 
Oh yeah! Also forgot to mention that the RMC nipples threading is a little rough, they arent as "smooth" screwing into the cylinder as are slixshots or even stock nipples. They tend to have tight spots etc....so have patience screwing them in place and dont force it or you can strip threading etc. I find that when i hit a tight spot all i need to do is apply even downward pressure and screw in/out. I have yet to strip a thread but sometimes i worry. So use a good grease or lube of some kind for the threads and maybe run the thread area between some sandpaper to kinda smooth it out.
hey thanks for your help and yes I love information so I love to see what your recipe is? plus I use a little dab of antiseize on my threads you know that gray stuff from orielly's lol but it works real good on then tight spots makes it smoother!
 
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