Falling block Ream 44 Spl to 44 Mag

Do you intend to shoot black powder or smokeless? I would not shoot anything other black powder or a substitute in the .44 mag in a rifle that old. That being said a .44 mag finish chamber reamer and go, no go headspace gauge would do the job.

If it’s original, I agree. Older guns were made for the power of the cartridge they were made for. Same reason it’s not a bright idea to run modern 45-70 loads through an older rifle that used black powder 45-70’s.

If you’re itching for a 44mag rifle, I’d rec. grabbing a Henry or maybe a Marlin 1894.

bluetopper said:

NO! it’s a recent production Uberti falling block 44 Special I’d like to make to a 44 Magnum. It’s called a model 1885. And no I’m not going to use black powder.

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Before you do anything, I'd suggest you make sure it can take .44 Magnum pressures. If it can't, you'll hurt the rifle.

You did not say whether your Uberti is the high or low-wall type. The high-wall is offered by the factory in .303 British, which is one of the calibers chambered in the original Winchester High-wall rifles. The High-wall should certainly be safe with the .44 Magnum, but the low-wall, while suitable for .44 Special pressures, would not be a good choice for the .44 Magnum, which operates at pressures of the same level as the .303 British. A good gunsmith can easily ream your chamber for the longer round, but should be aware of the limitations of the low-wall action, which does not provide as much support to the breechblock as the high-wall, and therefore is not suitable for the higher pressures.

PRD1 - mhb MIke