Neck sizing die for 45-75

[Asa Smith]

#1

Does anyone know of a neck sizing die that would work on a bottle neck of the 45-75 Case?

Trying to get the most out of my Jamison brass and my Lee dies work the full length of the case. 

I have had cases split on the 4th reload.

I plan to anneal the neck then neck size only.

My 45-70 neck size will not work due to the larger body diameter of the 45-75 case.

Any advise appreciated...

#2 

Looking to have my original hammer on my 1860 NMA Colt (built in 1863) rebuilt (welded up and notches recut), as well as get a replacement trigger (the original has a larger hole for the screw).

The originals have been ground on so much that a rebuild is needed....

I have a modern replacement hammer in the gun that works but would like to have all original parts (if economically feasible).

The gun is a shooting example and not a high end collectible.

Love the gun and it is a tack driver. (by the standard of my ability)

Barrel ends are at point of aim...

 

 

Thanks to any and all help

 

 

Asa

[J.D. Daily]

CH Tool & Die lists a neck sizing die.  https://chtoolanddie.com/calibers/45-75Win

[July Smith]

1)  I would think just about any FL sizer die could be backed off enough to neck size only.

 

2)  I'd contact either Al Harton or Mike Brackett for working on an original Colt.  PM for their contact info if interested. 

[Asa Smith]

July,

Tried to PM you, message failed to send.

Interested in the gunsmiths contact info.

Asa

[Sedalia Dave]

If you have access to a drill press with a vice you can modify a 45-70 neck sizing die to work with your 45-75 brass.

 

You will need a carbide flex hone like the one pictured below. They can be had in several sizes. You will need one a little larger than the body of a 45-75 case.  I bought mine off Amazon

 

 

Next you have to figure out how much of the die needs to be opened for the 45-75 case to be properly neck sized.   Clamp the die into the vice and the hone into the chuck.  Now set the depth stop on the drill press so that the hone only goes as far as needed into the die. You want to open the die up so that the next remains the same but the area below the neck is opened up to allow the case to insert to the proper depth.

 

Use a generous amount of oil and begin honing the die by moving the hone up and down slightly. You don't want it to run in one spot too long or you may cut grooves in the die. Don't allow the hone to exit the die while the drill press is running. It will wobble and bend the wire shaft.

 

Go slow and take your time, checking fit as you go. 

 

I used this trick to modify a 44 Spcl/Mag crimp die to work with 44-40 cases. The 44-40 crimp die I had was too small for .429/.430 bullets.  Took a while but the die now works flawlessly.

[Sedalia Dave]

BTW the reason your cases are splitting is the brass is too hard. They definitely need to be annealed.

 

This is a common flaw with a lot of factory brass. 

[High Spade Mikey Wilson]

What if you set up a 45 Colt die so that just the neck of the 45-75 enter the tungsten steel resizing ring at the mouth of the die. That would under size it a little to .452 while you need .4575. Then run it through a die to flair the case mouth a bit before seating the bullet. Just a thought.

[July Smith]

12 hours ago, Asa Smith said:

July,

Tried to PM you, message failed to send.

Interested in the gunsmiths contact info.

Asa

PM sent