Just my two cents guys, but a revolver will almost always shoot its best when bullets are sized according to the throats, not the bore. Even in a high velocity round like the Jet. It doesn't operate at any higher pressure than rounds like the .454, .475 etc., and they work best in that regard, either with lead or jacketed. Jet bullets are almost pure lead cored which means they will swage down in the bore ok. It's far more critical to match throat dimention with bullet than bore.