Keith
Silly idea: 356 GNR J Magnum Frame or SP101
Friday, November 05, 2021, 14:03

I stipulate that this idea is ridiculous.

That said, after about 30 secs of thought and a few back of the envelope trigonometric calculations, it looks like an sp101 or j magnum frame (post '96) in 357 magnum could be rechambered to 356 GNR.

Although K frames are too crowded, the j frames, being 5-shot, actually give more room for larger calibers even with the smaller diameter cylinder. Ignoring overall strength, it looks like the biggest issue would be rim interference with the ratchet. A solution could be as simple as turning down the rim. Alternatively, neck-up the 300 gnr to 35 caliber, but use 225 Winchester brass (which already has the .473" rim, significantly smaller than 41 magnum's).