I appreciate all the input. As I have said before, building engines is my bread and butter. Machining and building guns is my therapy. My cost to develope different ideas is small because I do it all myself. On occasion I do like to make a little profit on it once in a while. I have boxes of one off designs that I have lost interest in. The 22-250 is one of them. I only threw it out there because a couple of my buddies were convinced that it would have a large interest. You're right,some varminters love the idea, blasters could care less. The reason I shoehorned it into the AR lower is because AR lower forgings are plentiful, AR10 are not available. Plus its a smaller package. I am allready tooled and jigged up for AR15's and it only took a small program change to do it.I didn't have extraction problems, just feeding. I think part of the problem is that the bullet tip centerline is .050 lower because of larger case diameter.Ramp,follower and spring would fix it I think. As far as 30-06 and 7.62x54, cartridge length is way to long for AR15 type lower. They would be a stretch even in an AR10 lower. Im not sure how well the russian round would feed being a rimmed cartridge. Varmint guys are almost all bolt shooters, at least the ones I know. They have no use for gas guns as they call them. They will go out all day and be lucky to lite off 50 rounds. For me that is like fishing all day and only getting a couple bites. When I do rarely get a chance to go out and shoot, I want to tear some shit up!!! I have a couple of other shelved designs that I am going to dig out and post some pics just for fun. I am not worried about someone stealing my ideas,hell, If they want to make em, more power to them. Makes the marketplace more colorfull.