Your certainly free to build whatever you like, but the 260 AI does not yield much improvement over the regular 260 Rem. At best you'll gain about 75 FPS, shorten your barrel life ( 4.5% more powder down the spout to gain about 2.25% more velocity), and then you have to fireform cases to get those marginal gains, which again will shorten your useful barrel life as an AI. I really don't see the attraction.....