Re: 280 AI replacement for 270 Win.
Unfortunately, I cant shoot "out back" - the neighbors are too close. Nearby FS land where I sometimes shoot is snowed under until spring thaw which is usually May or so. This time of year I shoot at the range which is about a 50 min drive and I've got some other testing going on that's a little higher priority with my 25-06. I might get some RL temp testing done with the 7mm or 300 WSM sooner, but it would require several trips to the range under different temp conditions.