Hatsan .30 Cal Barrel Bore/Groove Diameters?

[ghostdncr]

Ran across a clearance deal on a Hatsan 130 .30 cal this morning, threw common sense to the wind and ordered it before I could get myself stopped. Figure I may as well get started machining a pellet mold but have no idea what bore and groove diameters Hatsan uses in this caliber. Google isn't helping, so do any of you guys happen to know? Thanks for any help!

[TreeburnerCT]

I think you're going to have to slug the choke to get accurate info for your specific gun at least based on the replies I got to the same question.

[ghostdncr]

Thanks for the response, Joe. Based on some word-of-mouth info, it sounds like Hatsan's using approximately standard 7.62mm rifle bore dimensions, .300" land and .308" groove. I machined a quickie cylindrical swage that produced a .299" body with a .309" skirt and they shot okay for me, but it took some extra pressure to drive the skirt home. I'll probably make the "production" tool to form a pellet at .299/.307 after slugging the bore to confirm the 7.62mm dimensions.