I too have a M29 Classic, in blue, scoped with a 2x, & a 6" barrel. My best & most accurate load: I cast my own from wheelweights, a 315 gr bullet with gascheck. The mold is from LEE. I also make my own lube from 1lb of beeswax, 2 toilet bowl was rings, & 1 bottle of LEE"s Alox. I size the bullets to .429". I put this on top of 20 grs. of H110 & a Winchester primer. At 50 yds, I have been able to get 1" groups off a bench rest. This load is a bit stiff, so you might want a shooting glove.
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