Looking for loading help for Remington Rolling Block Swedish 12.7x44

[Rooster Ron Wayne]

I just picked up a very very nice Swedish Remington
Rolling Block in 12.7x44
From what I'm finding online pretty much the same as 50/70 Government BP Loading .
Seller said he used 50/70 or 28ga brass shells .
Just learning about this cartridge.
Any help would be appreciated.
Thank you.
Rooster Ron Wayne.

[LongWalker]

If the seller was actually shooting 50-70 or 28 gauge brass shells, the chamber has been re-cut.  If a 50-70 shell won't seat, it hasn't been re-chambered.  The one I had was like the latter, and the barrel chopped to around 22". 

When I re-built it, I set it up as a saddle-ring carbine, with a side-lever conversion I copied off a friend's Gove.  Load was the old carbine load of 45 gr of black and a 300 gr. round-nosed flat point.  (At the time I had a dedicated gun to fire-form .348 Winchester brass, and saved all the cases that split necks for my little carbine.)  I cut the brass to allow the powder charge and enough bullet space to seat and crimp the bullet--that way if the carbine shot better uncrimped, I could use the crimp groove as a lube groove. 

I actually shot a few matches with that little carbine as my only rifle.  I even won one!  But it was a shooter's rifle, and not one for a gamesman.  The guy I swapped it off to re-stocked and re-barreled it (to 50 cal) and made the sweetest little 50-90 elk rifle!  I still want one like that.  Someday. . . .

[Sir Charles deMouton-Black]

Here is a search result. A couple of the threads feature - ME! Whee!

http://www.cascity.com/forumhall/index.php?action=search2