Back in '73, I bought a Weatherby .257 Mag. It was a 1-12" twist, 24" barrel, and I wasn't happy with it. Had it glass bedded, and still, no matter what, it wouldn't stabilize anything over 100gr. I had a bunch of .257 bullets, and components for an "overbore" rifle, so when I ditched it later that year I bought a (then new) Ruger M77 24" heavy barrel. Shot lights out almost no matter what I fed it. Bought a forming die and made all my 26-06 from range brass the M1 guys left around after a match. Lake City '54 and '57, some new actual 25-06 brass, some Remington brass...you name it. Formed it down to near .257 in the RCBS forming die, and then finished it in the FL die. At first I worried about neck wall thickness, so I bought one of the old Lee Target loaders which had a die you banged the case in with a mallet, and then reamed the inside of the neck wall. After some experimenting, I realized that was pretty much a waste of time because the outside of the case neck with bullet inserted was within spec. without reaming. Never had chambering problems. You do need to trim the brass if you FL size. Lately, I've just been collet neck sizing, and everything's fine. Shot beaucoup woodchucks and deer when I lived back east. I haven't shot it out here as I have been hunting mainly elk, and I have heavier calibers for that, but I wouldn't hesitate with either the 120 partitions, the 115 TSX, or the 120 Sierra GK. I saw a huge hog taken with the 120 GK. Bullet went right through both lungs and left a nice hole on the far side. Guide shot the animal in nearly the same spot, with a .308, and the bullet never exited. The 120 gr GK is also hollow point, and when you see penetration like that with a nice exit hole, you know you got something!