So I picked up a .22lr rifle. Tried a bunch of different ammo in it. Buddy of mine had a box of sk rifle match. It shot lights out. Like ragged hole at 35 yards, so I bought a couple of bricks of the same. Well I guess due to different lot numbers or what have you, the new doesn’t come close to what I was expecting. Is there a cross reference from one lot to another, or is it really just a guessing game? I would love to trade this ammo for some of the same lot, but due to the age of the good lot, I doubt any could be found. Maybe someone has some suggestions.