Tim: I take it your KM77MKII is from the original run of 1992 or so. The current run is the ultra light with a 20" bbl as opposed to your 22". Having said that, I bet the bores would be the same. Pity, for there are far more .308 projos about than .311. I was also thinking of trying the sabot trick: the 7.62x39 being a very good candidate for this procedure. Thanks for the info. R303.
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