How is the chamber lead angle determined?

[Kurt]

Tod.
My competition is pretty much over on my end also. Just can't see anymore.
My chambers are a clone of the originals that I was able to get a chamber cast from and sent them to Pacific and had them measure the degree and duplicate it. I did change the base to be able to use the .45-2.6 brass with out swaging it down.
The bullet is a 476 gr prolate I had Steve Brooks make the mould.


Kurt

[Don McDowell]

That mess is headed this way too, are you calving right now?
You should have green pastures this spring!

Todd yup about 1/3 done with calving.
This storm makes me more optimistic about being able to stay in the cow business, come ice out.

[Don McDowell]

Todd what's the history of that barrel and who reamed the chamber?

[craneman]

Morning Don,
I bought this barreled action from a guy in Oklahoma, Dan Zimmerman from DZ arms chambered it. I am sending him an email to see who supplied the reamer for it.
Here is a picture of my crude drawing of the chamber.
It is designed to neck down/resize 45-2.4 brass to .44.

[Don McDowell]

Give Dan a call he's pretty good to talk to, and can give you all the pertinents on that chamber. I would think it's the one he uses in his hepburns, but maybe not.

[craneman]

My thoughts too Don.
At this juncture I am concerned about the long freebore for paper patch, I have already been working with one like it in the Winchester 45 2.4. Looks to me like if one ran that chamber out to eliminate the freebore you would have a truer 44-100 chamber that could work well with paper patch.

[Kurt]

Todd,

The free bore is not a problem for a PP bullet, but that chamber end wall is. It will cut the patch at the end of the case mouth. I have the reamer of the drawing I sent you on the PM but the dimensions you pit down in the photo are to large at the base and case mouth for you to run mine through to open that chamber too 2.6" for the 100. Your only choice is sending that cast in and have a throating reamer made and you can use that to deepen that chamber to 2.6and that will clean that chamber up in fine shape.

Kurt

[Don McDowell]

Todd I think until you get a new reamer like Kurt said , you'll have to settle for shooting that with greasers.

[Don McDowell]

Or what about reaming that to 44 2 5/8?

[craneman]

Don,
Great minds think alike, after discussing this with Kurt I believe that is exactly what I am going to do. By my calculations if I order a throating reamer that will extend the chamber to remove the freebore I should end up with a chamber that will take brass 2.583 in length which gets me where I had envisioned, with a 7 degree leade...
at least that is the plan.

Todd