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58 CF rolling block (Read 906 times)

RonnieMilsurp Participating Member Offline Posts: 19 Joined: Feb 25^th, 2024	58 CF rolling block Oct 12^th, 2025 at 9:40am	Print Post
	I just picked up an early rolling block conversion in 58 CF yesterday at auction. Haven't received it yet, but I had a question about an "XX" stamp on the top of the receiver. Any insights?


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TomKlinger Full Member Offline Posts: 176 Location: Central Florida Joined: Feb 17^th, 2019	Re: 58 CF rolling block Reply #1 - Oct 12^th, 2025 at 4:01pm	Print Post
	Curious as to what 58 cal. center fire you may have in the Roller. The only one I can think of would be maybe the .577 Snider. Tom Klinger


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1Hawkeye Full Member Offline Posts: 188 Location: South end of Northern Virginia Joined: Jun 29^th, 2019	Re: 58 CF rolling block Reply #2 - Oct 12^th, 2025 at 7:12pm	Print Post
	That is an odd marking. I thought all the .58's were rimfire. on the positive side if it is a .577 Snyder you can get brass from track of the wolf and that might work for a converted to centerfire .58 as well. XX could mean either 20th regiment or taken out of service, but most unit markings are on the side or comb of the buttstock. It's a definite mystery.


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RonnieMilsurp Participating Member Offline Posts: 19 Joined: Feb 25^th, 2024	Re: 58 CF rolling block Reply #3 - Oct 12^th, 2025 at 7:30pm	Print Post
	Apparently they are either .58 Roberts or .58 Musket, just gotta measure the chamber length.


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1Hawkeye Full Member Offline Posts: 188 Location: South end of Northern Virginia Joined: Jun 29^th, 2019	Re: 58 CF rolling block Reply #4 - Oct 12^th, 2025 at 8:42pm	Print Post
	Nice, are the case dimensions close enough to use the Snyder brass?


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RBKenn Senior Forum Member Offline Posts: 306 Location: fallon Joined: Apr 8^th, 2011	Re: 58 CF rolling block Reply #5 - Oct 16^th, 2025 at 10:41pm	Print Post
	I have a few. They are chambered .58 Berdan. A friend in OR sent me one chambered .58 Roberts. Have not seen one in any other caliber


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nineteen76 Junior Member Offline Posts: 78 Location: South Dakota Joined: Aug 17^th, 2007	Re: 58 CF rolling block Reply #6 - Oct 17^th, 2025 at 11:42am	Print Post
	I have 20 pcs of NEW Ballard Rifle & Cartridge, LLC 58 US Musket I would sell if it will work in your Rifle. These are true "EVERLASTING" cases machined from solid brass.


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ndnchf Frequent Elocutionist Offline Posts: 1090 Joined: Mar 6^th, 2014	Re: 58 CF rolling block Reply #7 - Oct 22^nd, 2025 at 3:25pm	Print Post
	I have one in .58 Roberts. Ive shot it quite a bit. Here's a video I made a while back. (You need to *Login* or *Register* to view media files and links)


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ndnchf Frequent Elocutionist Offline Posts: 1090 Joined: Mar 6^th, 2014	Re: 58 CF rolling block Reply #8 - Oct 22^nd, 2025 at 3:30pm	Print Post
	Its certainly no tackdriver. But with work it can shoot well for what it is.


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RonnieMilsurp Participating Member Offline Posts: 19 Joined: Feb 25^th, 2024	Re: 58 CF rolling block Reply #9 - Oct 26^th, 2025 at 11:07am	Print Post
	Thanks for all the responses! I finally got the rifle and it has a nice bore. I can clearly see the transition from the chamber to rifling, and it measures at about 1.4" so I believe that's a Roberts, if I'm not mistaken. Nineteen76, I saw your post. Looks nice, but a bit rich for my cheap blood! Plus, I believe yours might be too long? I'm gonna do Magtech 24 gauge brass.


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ndnchf Frequent Elocutionist Offline Posts: 1090 Joined: Mar 6^th, 2014	Re: 58 CF rolling block Reply #10 - Oct 27^th, 2025 at 7:11am	Print Post
	Way back in 2013 I chronicled my .58 Roberts load development over on the cascity forum. You might find it of interest. (You need to *Login* or *Register* to view media files and links) This is one next to a .22 short.


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RonnieMilsurp Participating Member Offline Posts: 19 Joined: Feb 25^th, 2024	Re: 58 CF rolling block Reply #11 - Oct 27^th, 2025 at 11:36am	Print Post
	Thanks, ndnchf! So you landed on using a minie? Looks like your target says .594" diameter? I am trying to source a Lyman minie mold. There are several out there on eBay but none have the base pin. Thinking of calling Lyman but I have my serious doubt they'll have one.


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oneatatime Frequent Elocutionist Offline Posts: 4164 Location: Rocky Mountains Joined: Oct 30^th, 2011	Re: 58 CF rolling block Reply #12 - Oct 27^th, 2025 at 2:40pm	Print Post
	Doesn't Lee make some with a fixed pin? I use one for a 45-70 405gr HB and it works great.


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RonnieMilsurp Participating Member Offline Posts: 19 Joined: Feb 25^th, 2024	Re: 58 CF rolling block Reply #13 - Oct 27^th, 2025 at 3:27pm	Print Post
	They do and I may end up doing that. I just heard that the Lyman was better.


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ndnchf Frequent Elocutionist Offline Posts: 1090 Joined: Mar 6^th, 2014	Re: 58 CF rolling block Reply #14 - Oct 28^th, 2025 at 3:58am	Print Post
	Yes .594" I sent a stock Lyman minie mold off to Hollow Point Molds and had it enlarged to match groove diameter. This greatly improved accuracy.


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