I didn't read all the follow up post, but if you are running an AR 10 Platform go with a 7MM08 since it is the same as a 308, 260, 243,. You will have issues with a 284 Winchester since it is a Rebated Cartridge and should be used in Med to long actions depending on the bullet. Am not saying that you can't do it, but don't do it!!!7mm is 1 of very few calibers I don't have under 33cal. Being able to use either cartridge in an AR platform has me thinking I might get a 7mm? The 284 gives me more velocity, but the 7-08 saves a little powder. If I were to shoot anything it would be swine of the get the hell out of my crops! I don't hunt deer or any other larger animals. I always feel the need for speed, but what would be the benefits between the 2 and downfalls? Brass in both I can find, but haven't checked on dies. Is either offered in srp?
The 7mm08 is a great cartridge if you want a 7MM. If I had an AR10 and wanted to go with a 308 size cartridge, I would go with a .260 or .243 to get the velocity in a shorter barrel and lighter bullet with better BC.!