My original Creedmoor 44-77 roller take a case with a .090 rim.  My research tells me that cases turned from bar stock will not hold up as well as formed cases will, so i have been reluctant to have some made.  I bought a couple of boxes of factory stuff that was advertised as for the 44-77 Remington and Sharps, but they have the thinner rims like the Sharps used. 

Sure would like to find a few cases of 44-77 or 43 Spanish with that .090 rim thickness.

OLReliable wrote on Sep 5^th, 2019 at 9:32am:


That's mostly true. But I've found some donor cases actually had too thick a rim on the .43 Mauser cases I use. I have to turn them thinner to be able to fully close the breech block.

I have been playing with 375 H&H for the base brass its long enough for 44-90. The base is .512-513 so I turned the belt off made a few brass washers for the rim now I need to fire form them. I have 20 BACO brass made from 348 rims are bent to head space the base is turned to .513-.514 and drawn to length. On the 10 Winchester 375 cases I have that are made into 416 taylor  the rim is .528 X.048 so I made up a few washers with a .625 od X .085 thick with a .527X.050 step in it and pressed it on the rim with loctite stud and sleeve mount  and trimmed them up after pressing them on. I have 20 new 375 remington case and the base is .498 . 300 & 458 win mag is long enough to make 44-77. the thing I have not checked is case valum it may be down from the 348 made cases.   Ken

I bought some of those , was going to  pull the bullets and powder and fireform  with some bullseye and cornmeal, as soon as I get my sharps back with a new barrel.

I am in the process of making 43 Spanish brass out of 300 winchester magnum cases.  If interested I will post where I am at so far.  Not hard to do.

Well here goes.  These cases might not be for a purist but I believe they will make good usable inexpensive cases.  I will go by my steps I have used and try to attach some pictures.
I purchased 300 Win. Mag cases from Graf's and Son on sale $20 per 50
Purchased snap rings from McMaster Carr for $6.35 per 50
Turned belt and head to .523 to fit rear of chamber.
Ran cases thru sizing die to form shoulder.  Cut end of sizing die off so long case can extend thru die.
I annealed case shoulder so I could blow it out with bullseye and cream of wheat
That is as far as I have got but will do the following.
Next step is to trim to length you want.  Blown out case is 2.600 long.
May have to ream neck for correct neck id for bullet being used.
place snap ring on case.  On my cases that provides almost .090 rim thickness and .625 rim OD. perfect for my rolling block.
Case will expand .010 max. on a side near head on first firing if pressure is high enough but should not move much after that.
 

Snap rings used

cheatin