Its hard to predict anything 10 years but Id bet that itll be no prob to get ammo for the 300 7mm and 270 WSMs. I have the 270 WSM and love it. The short action round has a couple of fundamental advantages over long action because of a stiffer bolt and more consistant powder burn. So its usually the more accurate caliber compared to the same in the long action round. I especially like the 270 because there is a void in any 270 magnums(other then Weatherby) compared to the other 2.