I'm not sure I understand that conversion process. Wouldn't the length of the chambers and distance from the back of the frame to the forcing cone be the issue?
This is why I thought of it. It makes no sense for Ruger to have two bins for each part on a GP100 for .38sp and .357. Just bore the cylinder less than the .357 version and, voila, .38sp cylinder.Not necessarily. Ruger wouldn't have made a special shorter windowed frame for special contract runs of .38spl GP100s. It makes no sense to spend the money to do that when they can just make a different cylinder. Very likely, the cylinder is the same one they use on the production .357 model, just only bored for a .38spl length round.
The frame is strong enough to handle the .357 magnum, it is pretty much just an issue of getting the rounds to fit in the cylinder. A little reaming and you're there, assuming the rest of the gun is the same as "normal" production. I'd bet it would be.
Like said above, I think it's as simple as having a .357 Magnum Cylinder fitted onto the revolver.Minor hijack: Could a .38sp GP100 have the cylinder modified to accept .357 mag cartridges safely?
Like said above, I think it's as simple as having a .357 Magnum Cylinder fitted onto the revolver.