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by mtngun
Tue Nov 21, 2017 3:15 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

Finished the barrel nut wrench, and started on the scope mount.
Image
by mtngun
Mon Nov 20, 2017 2:35 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

I had contemplated contouring the shroud to nearly exactly match the frame, but I didn't have some of the tooling needed to do fancy contouring, so I did the best I could with the tools I had and called it good. ;) Aluminum shrouds are used on 38 special competition revolvers, but I've never heard o...
by mtngun
Sun Nov 19, 2017 6:37 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

I needed a way to position the shroud parallel to the bore. I had a ground rod that is used in combination with bushings to true various rifle actions, so I made a couple of bushings to fit the 0.680" bore of the shroud. https://imgur.com/n9hwzQ2.jpg Set the ground rod on blocks and mill the to...
by mtngun
Sun Nov 19, 2017 1:27 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

A chunk of aluminum from the scrap pile was sawed to rough shape and then lathe-bored. I didn't have the desired drill or reamer on hand so I made a D-Bit reamer, which worked well enough on the aluminum. The aluminum was not labeled but there's a good chance it's 7075 or Fortal (same thing). https:...
by mtngun
Sun Nov 19, 2017 9:40 am
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

I cut the forcing cone with a boring bar, and finally got around to slugging the barrel. This no-name ebay barrel has an eclectic 10 grooves, almost like a microgroove, except the grooves are normal depth. A 0.347"+ pin is a very snug fit in the bore. It's not lapped and you can see some light ...
by mtngun
Sun Nov 19, 2017 6:30 am
Forum: lever actions
Topic: 325 gr Design for Ballard Remlin
Replies: 12
Views: 85

Re: 325 gr Design for Ballard Remlin

That's great that they feed. :)
by mtngun
Sat Nov 18, 2017 3:57 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

Tenon cut with 0.006" offset, which should put barrel/cylinder alignment within 0.0015". The tentative plan is to end up with an 8" barrel, but in this photo it was 9 1/4" in case I wanted to set the barrel back and re-cut the tenon. I doubt if I ever will set it back, though, so...
by mtngun
Fri Nov 17, 2017 2:01 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 18
Views: 294

Re: S & W N-frame Project

I wondered if I could compensate for the factory cylinder's timing error by cutting the barrel tenon offset from the barrel's bore? To test that theory, I made a dummy tenon from a short piece of scrap metal, with a 0.358" ID, except the ID was offset from the OD such that a test indicator show...
by mtngun
Wed Nov 15, 2017 9:05 am
Forum: lever actions
Topic: 325 gr Design for Ballard Remlin
Replies: 12
Views: 85

Re: 325 gr Design for Ballard Remlin

I usually cast COWW at 700 - 725 degrees, but the mold temperature is more important than the pot temperatures. Once the mold is warm enough to fill out, I regulate its temperature by adjusting the time between pours. I guess some people try to speed things up by cooling the mold on a wet pad betwee...
by mtngun
Tue Nov 14, 2017 6:19 am
Forum: lever actions
Topic: 325 gr Design for Ballard Remlin
Replies: 12
Views: 85

Re: 325 gr Design for Ballard Remlin

Please let me know if the bullet cycles and chambers OK.

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