I have many AI's, 22-250AI, 308AI, 30-06AI, 6MM-06AI. At this point in time, I have not shot the 308 yet, just did this one a few months ago and being in Wisconsin, I really haven't had the weather for shooting. But I will say so far the only one that has dissapointed me had been the 30-06AI. I gained next to nothing, maybe 50fps on it and it kicks like a mule. The 22-250AI is just awesome. In the HEAT of summer I have chronographed some of my loads at over 4100fps, 55grain bullet and the gun shoots like the no tomorrow. I will tell you as well, in my opinion, having been around many production guns, that a custom chamber, cut nice and true on a lathe, versus being mass produced at a factory, definately has some merits. Accuracy tends to be a bit better, but then again that is provided all other aspects of the rifle are there, ie bedding, load etc. The 6MM-06AI, is another fine shooter and has plenty of zip. It is really awesome on groundhogs at long range and can zip a 105 A-max at around 3700fps. I would say the Ackleys are worth a good look depending on caliber. Try it, if you don't like it I am sure you could always find someone to buy it. It is fairly easily done on a production barrel also, which in most cases cuts the cost down at the local gunsmith shop. I ahd one done by Howard Wolfe, back in PA and it only cost me, at that time, $50.00 so, I really don't feel that I lost anything there.