anyone have a diagram or measurements of the  .45-60 Win?

I understand it was designed for some of their lever-rifles.

Some states are now allowing some rifle cartridges for se in formerly pistol/shotgun/muzzle loader restricted zones.  there is a long series of logic and discussion but basically the regulations require the use of a cartridge no less than 357  mag in diameter and length. and a case length of 1.8".

Rather than rebarreling a 45-70 Ruger #1 to something like a S&W 460 (which uses 45 pistol dia bullets) I'm considering having the barrel set back and rechambered for a shortened and very lightly taper necked down to fit a standard .458 bullet properly. 
  The .45-60 has been suggested as a possible candidate , though the neck might require a bit of trimming. But I have run into a wall trying to find proper case & reamer specs

Id appreciate a scan  I'll PM you,  but eventual posting it might be good for future reference for others

Hope this helps Q. ,,,,,,,DT

those are nice illustrations  and I really appreciate them very much.

However   (don't you hate to hear that word )  I just finally located my  "Handloaders Manual of Cartridge Conversion's" by J J Donnelly   Stoeger  1987

And on page 597 (quoting COTW 4th ed p 122) it shows it as having a straight .454 degree per side taper form the .508 head/base diameter to the .479 case mouth with an overall length of 1.89. as formed from standard 45-70 cases with standard rim diameter and thickness.

I'm wondering which is right or if both are.   

  Would a chamber reamer have the same measurements as the outside of a fired case?  I don't understand how brass stretch and spring back is figured in.
Did COTW and Donnelly base their work on measuring cases or on actual chamber specs. 
OR is this old case too old to have a standardized chamber design?

I'm obviously concerned with the very slight shoulder shown on DT's illustrations since the various state F&G regs are specifically in some cases prohibiting "bottle necked" cases.  I suspect that a straight taper from the base to the bottom of the .4795 long neck would be acceptable. However that would entail calculating a different per side degree of taper.

More info. (You need to Login or Register to view media files and links)

Hey Q. Had this 45-70 Gov. case on the bench that has been cut down for a powder measure. It just so happens to be,1.750 . I put a 500gr. bullet in it for looks. The case next to it is a full lenth 45-70Gov. case. Looks like it would be a great cartridge in the 300gr. bullet (You need to Login or Register to view media files and links)range. DT

QuestionableMaynard8130 wrote on Jul 23^rd, 2014 at 10:38am:


You might want to buy  set of 45-60 dies made by who ever is your preferred die maker.
Make a cast of the FL die and size a few cases.
Those are the dimensions have to fit your new chamber.