.257 Ackley Improved that I had built on a Remington Model 7 action, 22 inch PacNor barrel, Brown Pounder stock and Leupold Ultra Light 3x9 scope with S &K mounts. The whole thing weighs a little over 6 pounds and consistantly shoots ¾”groups with 100 grain bullets of any make. I can get chronographed 3200 fps with any 100 gr bullets I’ve tried but I normally load them to 3100 fps because I get better case life at 3100 fps. Every year before deer season, I take the rifle to the range and the zero never changes and the size of the groups is always about ¾”!