I have a 260 ackley that I built for a local match once a month. I shoot and practice with it constantly. I have well over 1000 rounds down the pipe in fact my records show closer to 1200 and accuracy has yet to fall off. My throat has only grown about 004" since I built it. The rifle still holds 2-2.5" groups at 600 yards. This has been by far my most accurate and consistent rifle. I don't push mine hard, I found a great accuracy node at 2950fps with 140 bergers and 43.5gr of H4350.

Because of my success I have helped a couple other shooters build a 260ai. They have all been on short action savages and there has been no problem fitting in the mag box with 140 class bullets. Each build I have helped with all preferred H4350 powder and each barrel regardless of make seems to have a sweet spot between 2940-2960fps.