Rw, arrowbullet is correct on your barrel twist.
My 9-1 likes 45 grn, and 63 grn. It doesn't like 55 grn or 69 grn. If the mini had a stiffer barrel, it would be different, and your mini will be different than mine. You just have to try a variety of ammo to see what it likes.
My 9-1 likes 45 grn, and 63 grn. It doesn't like 55 grn or 69 grn. If the mini had a stiffer barrel, it would be different, and your mini will be different than mine. You just have to try a variety of ammo to see what it likes.