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For Sir Joe and anyone else interested:











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XRM: "Extra Round Magazine" for Winchester M70 Classic.
The XRM box is not much bigger, but it did allow me to get an extra cartridge into a rifle
and close the bolt over it, for both a .400 Whelen-B and a .458 WM+ with 3.6" COL.
No need to restock with a drop belly stock and drop magazine
like with a Sunny Hill-McMillan combo which allows only one extra cartridge also.