JohnsonBarr,what design 160gr. lead bullet did you use in the load that did not do well. What lube was you using?I have not worked with this particular cartridge,but if I was satisfied that the lube was up to the task and there was enough of it for the barrel lenth. And it did not shoot well. I think I would try a card wad,or two under the bullet and see if the bullet started to group. If it did not I would then move on to another bullet design. Even though I would rather the heavy for caliber bullet at the 100yd. shooting you spoke of I would guess that you may need a lighter and shorter bullet, with the 1-18 ROT. But I would not give up on the 160 range bullet to soon. With good lube, a card wad or two ,you may get it to shoot great . What Bp. are you using? ,,,,,,,Dusty