hello, I need help deciding which case to choose on improving for a thousand yards. I have just recently been bit by the long range shooting bug, I'm currently shooting 6mmbr with a 1 in 8 twist, and the 105 berger vld. I'm looking for a case either in a 6.5 or 6mm to shoot the 115 6mm or 142 6.5. My one concern is barrel life I cannot afford to change barrels every 1,000 shots in a 6.5-284. I was thinking of a 6x47 lapua or the 6.5 creedmore any suggestions or thoughts on that would be greatly appreciated. Also barrel length and rates of twist and estimated fps barrel life as well. Thanks bulldog284