Reeder Custom Guns - 356 GNR in a 5" GP100

Hi,
I am a big fan of the Ruger 5" GP100. On a quest for more power in the same gun (without spending huge money on a 41 mag conversion) IS THE 356GNR A "DROP-IN" CYLINDER??? Is their much performance to be gained from the 5" barrel in the new chambering? I reload and can get 158gr @ 1300fps now, I'm not sure how fast my 170's are going.

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especially in a double action revolver.The 356 GNR in a 5" barrel will do almost 1800 FPS. Your best bet would be to simply rechamber your 357 mag cylinder to 356 GNR. Otherwise you would have to take the whole gun apart every time you change calibers, as the new cylinder would have a new crane and the whole cylinder assembly with it. Plus due to the extreme velocity gain you would have to re-sight your GP in every time you change calibers.

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is wrong. For safe shooting, every cylinder needs to be fit.

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356 GNR in a 5" GP100

there is no such thing as a drop in cylinder

Gary is right. If the cylinder drops in, something