I was looking at rechambering a cylinder too 40 or better yet 10mm using a 38-40 Colt barrel. But then I looked up the pressures that the 40 and 10mm run at. Even the light loads worth building are too much for a new 3rd Gen Colt.
Then I thought about using the longer 10mm Mag brass and getting a longer OAL to fit in a Colt's cylinder and while doing so lowering the pressures. All good but head spacing off the case mouth is going backwards on a Colt for sure.
At one time Col built a few 41 Mag SAA Army guns that seem to function just fine. I'm guessing the 41 mag is the highest pressure that a Colt can take (if only barely) @ 36K psi. The 357 Magnum is 35K psi but has more steel in the cylinder. The 45acp runs @ 21K psi. The 45 Colt runs at 14K psi.
Then the thought occurred to me that the 9mm, 45acp, 38 Special and 44 Special are very short cartridge cases inside a Colt cylinder OAL. 45acp pairs up nicely with the 45 Colt and is a lower pressure cartridge.
Question is, "anyone ever run a reamer into a 44 special cylinder and then run 44 mag brass at lower pressures or 44 mag brass using black powder? Seems like someone would have done this a long time ago. You could run the hot, heavy bullet, 44 Special loads in a 44 mag case, use a slower powder and lower the pressure doing so. Seems like a win to me. As long as you never stick a 44 mag load in the gun. 44 mag brass would also make a great BP round and have a stronger cylinder without the huge internal cylinder cut outs that the 44-40 and 38-40 require.
With good powder selection there is no reason you have to run high pressures in a 44 mag case.
"Elmer Keith recommend 5/Bulleye for a target load and 10/Unique for a mid-range load under that bullet in the 44 Magnum round. I have fired many of each and they work great "
Loading Down the .44 Magnum Safely - Shooting Times
Light loads for 44 Magnum (gunloads.com)
Then I thought about using the longer 10mm Mag brass and getting a longer OAL to fit in a Colt's cylinder and while doing so lowering the pressures. All good but head spacing off the case mouth is going backwards on a Colt for sure.
At one time Col built a few 41 Mag SAA Army guns that seem to function just fine. I'm guessing the 41 mag is the highest pressure that a Colt can take (if only barely) @ 36K psi. The 357 Magnum is 35K psi but has more steel in the cylinder. The 45acp runs @ 21K psi. The 45 Colt runs at 14K psi.
Then the thought occurred to me that the 9mm, 45acp, 38 Special and 44 Special are very short cartridge cases inside a Colt cylinder OAL. 45acp pairs up nicely with the 45 Colt and is a lower pressure cartridge.
Question is, "anyone ever run a reamer into a 44 special cylinder and then run 44 mag brass at lower pressures or 44 mag brass using black powder? Seems like someone would have done this a long time ago. You could run the hot, heavy bullet, 44 Special loads in a 44 mag case, use a slower powder and lower the pressure doing so. Seems like a win to me. As long as you never stick a 44 mag load in the gun. 44 mag brass would also make a great BP round and have a stronger cylinder without the huge internal cylinder cut outs that the 44-40 and 38-40 require.
With good powder selection there is no reason you have to run high pressures in a 44 mag case.
"Elmer Keith recommend 5/Bulleye for a target load and 10/Unique for a mid-range load under that bullet in the 44 Magnum round. I have fired many of each and they work great "
Loading Down the .44 Magnum Safely - Shooting Times
Light loads for 44 Magnum (gunloads.com)