Re: umm match 308 cal bullet into 30-30 case ????
You're missing the reverse point here; most 30-30 bullets are every bit as accurate as Match bullets, at least those that I've shot. Fired from a machine rest in a benchrest quality barrel, most of these FN projectiles will shoot every bit as well, and in some cases better, than a Match type HPBT.
While the HPBT Match bullets have a considerably higher BC, and would be advantageous at longer ranges, they have absolutely no edge in inherent accuracy at the typical lever action ranges involved here. Ballistic Coefficient and accuracy are separate, and distinctly different issues.
The safety issues already pointed out are a worthwhile consideration, too, and nothing to take too casually. Many years ago, one of Hornady's techs (Ed Heers) lost a hand when a bullet design they were working on created a tubular magazine detonation in their lab.