I have a .264 Win Mag, and can't see where the improvement would be. PTG would make you the reamer. If you want to improve the .264, the best way to do it would be a .264-300 Win Mag as it would bump the shoulder up and still fit in a standard magazine. There isn't enough taper in the body, nor a gentle shoulder on a .264 to go with the classic Ackley Improved formula and see any gain. My solution was to just run a longer barrel. I can get 3200ish with 140s, 3375 with 130s, 3500 with 120s and 3700 with 100s with my 27.5 inch Lilja barrel.
Thanks for the reply, I just worked up a load with my 26 inch barrel with 120's at 3275, I think I could actually get more cause I'm not showing any sign of pressure yet. I am using 66.5 grains of reloader 25, I think I could go with about 67 or a little more. If I shoot out this barrel I will replace it with a longer one. It groups so well that I can't relplace it yet. I have gotten consistent .5 inch groups with it. I did run those final finish bullets thru it also. It is so easy to clean now also.
One of the most important components of deciphering a new hunting area is distinguishing between the summer and winter ranges for the game that you plan to pursue. Without knowing this you cannot make reliable assumptions about where the game will be come opening day. Knowing these areas will allow you to take the current weather (as well as the past couple weeks) and apply that to the landscape and make an educated guess as to where you might find that big buck or bull.
There are a couple ways...