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by mtngun
Mon Dec 25, 2017 5:05 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

It's been too snowy to shoot so I prepped some bullets. I'm not normally a Keith bullet fan but it actually makes sense for this application. It's long relative to its weight -- which may be a good thing or a bad thing depending on what you are trying to accomplish. The long bullet will take up more...
by mtngun
Mon Dec 25, 2017 8:04 am
Forum: General
Topic: A Unified Theory of Cast Bullets?
Replies: 5
Views: 480

Re: A Unified Theory of Cast Bullets?

Bangbangman wrote:PS. Took another deer and two fox with one of your bullets yesterday. No hunting today- family Christmas ;)

Enjoy the venison. I know I would. :)
by mtngun
Sun Dec 24, 2017 8:56 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Origin of the Taylor Throat Apparently this was written by Mr. Taylor's son -- Taylor Junior? :lol: https://imgur.com/t9uGSWG.jpg https://imgur.com/Iio3bDp.jpg https://imgur.com/Avghjud.jpg I blew up Mr. Taylor's sketch so you can read it. -- it's not actually a straight freebore, but rather a tape...
by mtngun
Sun Dec 24, 2017 7:48 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Another take on Taylor Throat dimensions the barrel throat is lengthened one and one half to two calibers, and enlarged to slightly over groove diameter. The throat serves as the throat in a rifle barrel, enabling the bullet to become perfectly aligned with the bore before engaging the rifling. The...
by mtngun
Sun Dec 24, 2017 7:14 am
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

1994 article by Ross Seyfried "In Search of The One MOA Revolver" Since my M29-357 is not line-bored and since my used cheapo barrels are not hand lapped PacNors, I am willing to settle for 2 MOA. :lol: :lol: :lol: Ross's Taylor throat was 0.625" long (or about 1.4 times the bullet d...
by mtngun
Sat Dec 23, 2017 8:11 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Sketch of the "Taylor Junior" currently in the GM barrel.
Image
by mtngun
Sat Dec 23, 2017 5:59 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Testing the two experimental forcing cones. About 20 degrees outside, but warm inside the shooting shack. A bit of mirage but it was barely noticeable with the Weaver scope set at 6X. https://imgur.com/Q5Ba20l.jpg This is the 180 gr. bore riding GC that I mentioned in a previous post. It is a bastar...
by mtngun
Fri Dec 22, 2017 9:14 am
Forum: General
Topic: A Unified Theory of Cast Bullets?
Replies: 5
Views: 480

Re: A Unified Theory of Cast Bullets?

Table shows RPMs for a given velocity and twist.

CYAN = safe RPM's
YELLOW = challenging RPM'S
ORANGE = hold your mouth just right
RED = lotsa luck
.
RPM = 720 x Velocity / Twist

Image
by mtngun
Wed Dec 20, 2017 3:39 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Recutting the forcing cones in both barrels today. Usually, except for benchrest rifles, I indicate the barrel on a snug fitting gage pin. In theory a snug fitting gage pin's error should be less than 0.001". On expensive benchrest rifle barrels I use a gage pin to do an initial dial-in, then f...
by mtngun
Tue Dec 19, 2017 6:23 pm
Forum: revolvers
Topic: S & W N-frame Project
Replies: 81
Views: 2332

Re: S & W N-frame Project

Here's a sketch of the "Taylor Junior" forcing cone, in blue. The red line represents a straight line connecting the beginning and the end of the Taylor Junior cone -- the straight line is approximately 1.5 degree per side, about the same angle as used in many rifle leades. Would a simple ...

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