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I've been using Lymans 311334 sized .311 gas checked.
It's about a 180 gr?. Very Looong nose which is great as it runs down that long tube. Also the nose measures .301-.302 so as she starts it's already rubbing the bore keeping her centered. And feeds just fine out of the magazine. I've had trouble w/311329 and it's point getting stuck on the ramp.
HTH's TerryR