I don't mean to sound like I am in any way an expert on this, but if I were sitting at bench at the range, and a fellow came up to the next bench over and said he'd been playing with "30-06 +P" I would listen politely while he was setting up and by the time he was chambering the first round, I would be on the way to the car.
In fact, I've done that a couple of times-- not with 30-06, but with a fellow who claimed his 30-30 shot like a 30-06, and another time with a guy seeing how far he could push a 7mm Rem Mag mixing powders together. The point is, that you don't know what's going to happen. Neither does the other guy, not really. If I'm not going to go over SAAMI, why should I be sitting next to a guy who will?
