the same caliber??? I know that extraction was a problem with some, as the fluted chamber used by H & K and drip oilers used much earlier to lube incoming cartridges thus easing extraction will testify.......

I have a Jap M-99 that was once a dewat. In the course of making it a live gun, the weld removed from the chamber made it much too big.. I intend to rechamber it with a thread-in section. I was advised to get a reamer for 'Machine gun use'. The chamber reamers mfgrs tell me the std reamers will do just fine???

Any comment?? PJH
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