I recently brought a Remington no1 marked 44S on the barrel.
It was expected to be a standard 44-77 2 1/4" but turns one the chamber is 2.1"
I'm using 43 Spanish brass dies 
Groove is .449"
It's shooting ok considering the first 4" of the bore is poor
But the remainder of fairly good
I would just like to pin down if there was a 44-77  with the same big rimmed case but 2.1" 

Cheers 

The Remington 44s with the “S” designation were a special Remington target chambering that, IIRC, used a straight case.  I got the impression that it could be duplicated by tapering down a .45-90 or -100 case to .44 caliber.

Yes this is a bottleneck and big rim exactly as you would expect a 44S marked 44-77 too be ... except it's a 2.1" chamber

I'm not the least bit worried 
And I do like a mystery

nuclearcricket wrote on Nov 19^th, 2024 at 8:13am:


Appears the rim is smaller on the .44-60 made from .45-70 Sam? Does it extract fine with the extractor on a .44-60 rifle?

yes the rim on the cases shown are smaller and thinner  on the 45 cases than on the 44 case. I didn't have any issues extracting the case from my 44 chamber. My starline 45-70 rim measures about .600 in diameter, my 44-77 cases measure .625, so about .012 difference per side. Once your cases are fire formed you can use the shoulder to head space off of and the rim thickness will not make a difference.  That set up works for rimless cases why should this be any difference. 
Yes the 45 case is a bit smaller at the base than the 44 case and will swell up to make up the difference upon firing. If using new brass it shouldn't be a problem. The  case I used was a nickle Remington.  I have not tried it with starline brass but it wouldn't hurt at all to anneal them and perhaps anneal a little farther down the case than usual. I built bushing dies for my 44  and so far they seem to work well. Since each round will only be fired in one rifle, neck sizing should work for a very long time and hopefully make the cases last a bit longer as well.