This is a good topic, and I myself never cared at all for short barreled rifles in the least... The .308 and it's case design will probably be affected less than other high powered rifles with long cases and sharp shoulders, but there will still inherently be some velocity loss... I guess we'd have to see some chronograph data to be sure, but I gonna take a guess and say that the velocity would be around 100 fps less than a typical hunting rifle... That's still strong enough for 300 yard kills with accurate bullet placement on deer size game, and still a good bit stronger than a 7.62x39...