Guys I'm thinking about which cartridge I want to chamber my rifle in. I know many many many cartridges are capable of 500 yard hunting - deer or sheep sized animals. I want a very efficient cartridge and I don't need a magnum. Long barrel life is a plus as I'll be wanting to shoot this rifle often. Lower recoil is a positive feature. 500 yards is all I need. I was thinking a 6.5mm or 7mm over the .30 calibers but the .308 seems to be an ideal candidate for what I'm wanting. I was also looking at the .284 winchester as well but I do not know what barrel life to expect. On 6mmbr they say to expect 5000 rounds of accurate life for a .308. What can I expect with the .284? I've read a 6.5x284 lasts only 1200 rounds. Does that mean a 7mm .284 will last 1500? 2000? More? Less What about a 7mm08? or 6.5-06 or others? Every time you neck down a cartridge barrel life would decrease from the original correct? Short action or long action - it doesn't matter to me - what would you choose and why?