My Rifle is an R8 Blaser.. I have on it a 308, I also have 243 T3, what are the dangers would it be possible to load a 308 into a 243 barrel with the obvious result, and would it be possible to load a 243 into a 308 with the less obvious result, what would be likely to happen. I ask because I am thinking of changing the T3 for a 243 barrel, thanks Chris.