I have a sako a7 that I had rechambered to 243 ai. As others have mentioned, I enjoy not having to trim brass and I can shoot the same speed as the normal 243 at less pressure which makes by 243 ai brass last even longer. The cost of the rechamber job will pay for itself in savings because my AI brass lasts longer and I have some extra horsepower for 80gr ttsx for hunting. If I had any other cartridge worth AIing I would do so again in a heartbeat.