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.
There can be too much of a good thing with antler rattling.
I like to hit the horns together for a good 30- to 40-second rattling sequence and then hang them up and resist the urge to hit them again.
This works to the hunter's advantage, because if a buck has heard it, he may have been 300 or 400 yards away and he comes in and he's not exactly sure where it came from.
When finally is time to rattle again throw a slight change-up into the routine.
The second time, don't rattle as loud...