1876 NWMP .45-60 reloading to 70?

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JTF#

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I just got the NWMP 1876 repo off of marstars big sale.
its in .45-60 and I have read about how to reload for it but I was wondering do you think is possible to ream the chamber out to 45-70? is the 76' action strong enough?
 
the model 76 was chambered in 45-75 because Winchester wanted to compete for a military contract and the 45-70 was too long for the model. I think you would be far better off to stay with the 45-60. The original base diameter was .509 but I suspect that modern reproductions use .500 - .502 so that shortened 45-70 brass can be used. Even if the chamber is .509, a ballooning of .005" should not be a problem with black powder. Just remember not to full length size them if you are using 45-70 dies to reload with

cheers mooncoon
 
I thought all of those repro '76 muskets were in 45-75....?

Lyman 49th edition book has reloading data specifically for those guns and their chamberings. Give it a peruse. It's one of the chapters before the data section.

...unless I'm thinking of another Lyman book. I'm a data junkie...
 
I have a NWMP 1876 Carbine repro by Chappy. It is also in 45-60. It is a lot of fun to shoot, all one needs to do is trim .45-70 cases down to length. The 1876 Winchester action will definitely not take the .45-70 cartridge it is too long, that is why it was chambered in 45-75 originally since this round is stubbier and shorter than the .45-70, it is in fact the same length as the .45-60.
 
My NWMP Chaparral was a 45-75 and I believe George Madis author of the Winchester book stated that the original '76 carbine as used was chambered in 45-75 only, however I could be wrong as I don't have the book handy to check the fact...
 
It would be interesting to hear comments from all those Chaparral 1876 owners.
Most of the time, Chaparral products get totally bashed on the net.
I own a 1876 rifle in 45-60, and I can't find a bad thing to say about it.
After cleaning (nothing else) the internal parts and polishing the sear for a better trigger pull,
the rifle became very smooth and a real pleasure to shoot.
Trimmed 45-70 cases work great, and if you are like me and cast your own bullets, you will be up for a lot of accurate, economical shooting fun.

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I'm just sticking with the .45-60. I didnt' thinkthe 45-70 would work I just thought I would ask.
i bought a lee die set in .45-60. were do you guys buy your bullet moulds from? I have seen some .45-70 bullets In the right diameter but they seam to be to heavy like 400+ grain. is the lyman #49 book the one to get for data?
 
I got two bullet moulds, a Lyman and a Lee.
The Lyman drops a 300grs bullet and the Lee a 340grs bullet. Both bullets work great in the 45-60.

The Lee mould is up for sale, drop me a line if you are interested.
 
Hi Grant,
nice pictures.
I handled several original 1876 Winchester Muskets in the last four weeks at gun shows, and I must say that the Chaparral Musket is a very close copy of the original.
 
When first introduced by Winchester, the Model 1876 was chambered only in .45-75 .... but other cartridge chamberings were offered somewhat later. That may be all Kevan was trying to say.

However, are you asserting that you know of original NWMP-issue carbines in .45-60? If so, I would question that, as I don't believe the NWMP ordered any other calibers.
 
GrantR said:
When first introduced by Winchester, the Model 1876 was chambered only in .45-75 .... but other cartridge chamberings were offered somewhat later. That may be all Kevan was trying to say.

However, are you asserting that you know of original NWMP-issue carbines in .45-60? If so, I would question that, as I don't believe the NWMP ordered any other calibers.
Click to expand...

No I said I am aware of several Winchester M.1876 carbines clambered for .45-60. Not that they were NWMP carbines.
 
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