Reeder Custom Guns - GP100 321 GNR?

The GP100 in .327 Fed Magnum is a seven shot, just like the current crop of GP100s.

Does that mean the GP100 in .327 is readily convertible to 321 GNR with a simple rechamber?

will hold 7 of the 321 GNRs which are based on the considerably larger 357 mag case. I would have to do the numbers to be able to say one way or another. If I got an order in for this I would also replace the barrel. But right now we are not taking any orders for any of the Ruger or S&W DA revolvers

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I’m assuming the external dimensions of the 327 and 357 GP100 cylinders are the same and that the chambers of the seven-shot 327 and seven-shot 357 gp100 cylinders share the same centers.

Who knows if that assumption is reasonable. It is Ruger, after all.

Why the need for the new barrel? Just not a fan of the GP100 profile?

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barrel. Always have. The best accuracy comes from the .308 bore. There is more on this down below this thread.

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GP100 321 GNR?

just because it holds 7 of the 327 Feds doesn't mean it

Makes sense

On all 32 caliber barrels we use a .308 bore