what sort of barrel life can one expect out of a 243? 6mmbr.com estimates around 1500 +/- depending on how one shoots, to me that is SHORT!! and i know if it was only for hunting, that would be fine, but what if i like to play at the range a lot? (my nextdoor neighbor has 200yds in his property.) i dont want to deal with ridiculous barrel cooling, like 2 shots then cool for an hour (exaggerated) but regular 5ish rounds let it chill is ok. anyway, what could one expect, and any suggestions on how to extend it would be much appreciated.