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by mtngun
Mon Jan 22, 2018 7:21 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

I have been thinking about why the bullets with the .357" band added to the tip of the ogive did not shoot well. :geek: There are two challenges that any bullet has to overcome. First it must fly straight while passing through the gun. Second, it must fly straight while passing through the air....
by mtngun
Sat Jan 20, 2018 7:17 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

Since the "smooth" version of the control load had shot surprisingly well on January 13, I decided to try a couple more versions of the control load. https://imgur.com/uhPhhbd.jpg The uncoated version of the 180 gr. BB did "OK." If you disregard the one wild flier, the average gr...
by mtngun
Sat Jan 20, 2018 6:31 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

A 180 gr. bore-riding bevel base did not do so hot when tested on January 13. One theory was that the bore rider was not making contact with the rifling in the forcing cone, so I recut that cavity to have a 0.357" band on the tip of its nose. That increased the weight to 183 gr. but everything ...
by mtngun
Sat Jan 20, 2018 6:23 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

Since the 185 gr. Keith bullet was a dud, I recut that cavity with a band near the tip of the nose, turning it into an "almost wadcutter." The thinking was that the bullet would not have to travel as far to contact the rifling. On the other hand, the aerodynamics would suffer, and that mig...
by mtngun
Sun Jan 14, 2018 7:35 pm
Forum: General
Topic: 30-06 Elk Rifle Final Chapter (we hope!)
Replies: 2
Views: 1253

Re: 30-06 Elk Rifle Final Chapter (we hope!)

Notes on the chamber specs, not that the reader cares, but I like to post the specs in my threads because otherwise I'll forget them and lose my notes. :lol: -- max case length for this chamber is 2.494", trim to 2.490". -- chamber neck is 0.336" - 0.337". Factory cases typically...
by mtngun
Sun Jan 14, 2018 7:17 pm
Forum: General
Topic: 30-06 Elk Rifle Final Chapter (we hope!)
Replies: 2
Views: 1253

Re: 30-06 Elk Rifle Final Chapter (we hope!)

While I never experienced an unintentional discharge with the stock Remington trigger, on the other hand I was never able to dial in a satisfactory trigger pull while maintaining reliable functioning. After reading Jack Belk's book about all the things that can go wrong with the Walker trigger i opt...
by mtngun
Sat Jan 13, 2018 7:06 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

Testing the bevel base bore riders .... https://imgur.com/dNEMZch.jpg.jpg The 180 gr. teased me by shooting my first sub 2 inch group, but after that it went crazy, with too much velocity variation and too many vertical fliers. I'm not sure what caused it to fail but this design was definitely a ste...
by mtngun
Sat Jan 13, 2018 6:23 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

SHOOTOUT between a smooth bullet and a grooved bullet. I went into this shootout very prejudiced because I had previously experimented with smooth coated bullets in a rifle and the smooth bullets would not even stay on the target. In general, grooves were very important in rifle bullets especially a...
by mtngun
Thu Jan 11, 2018 2:53 pm
Forum: General
Topic: 30-06 Elk Rifle Final Chapter (we hope!)
Replies: 2
Views: 1253

30-06 Elk Rifle Final Chapter (we hope!)

I started this project in 2005, then got very busy so the project gathered dust for 13 years. :lol: :lol: :lol: This M700 started out as a lightweight elk rifle. Then for several years it was used to test hi-velocity cast bullets. The factory 10" twist barrel with its sloppy SAAMI chamber neck ...
by mtngun
Tue Jan 09, 2018 3:05 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 107
Views: 16417

Re: S & W N-frame Project

Since the 180 gr. bore riding GC shot decent even though it was a "bastard" design, I want to try some more bore riding designs, so here's a couple of new bullets to play with, er, I mean test. The new bullets have a crimp groove in the right place even though I'm not planning to crimp the...

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