Unfortunately the best way so say the difference has already been mentioned by Axe and JP. But truthfully it is the difference between the higher quality of the 700 and the low dollar model 770 for Remington. Obviously there is a market for both. But I am for better quality and durability for the long haul. Difference in acceptable tolerance the materials used and quality control variances to be acceptable. Before I would purchase a 770 it would be my suggestion you find a good used 700. If you have already purchased the 770 then it is done! Enjoy the rifle I may serve your specific needs and requirements well?
I do not suppose you will be putting that many rounds through it over a short period of time. If proper care is given to the rifle it would take a few thousand rounds to begin to wear the bore out. I do not think you ever will put enough rounds through it to worry much about that issue of excessive bore wear and especialy in the 308 Cal. As JP stated just keep the bore good and clean. Using solvent allow it to set for a while then dry patch it. And repeat the process until the patches come out clean. If you are going to store it for any period of time be sure to lube the barrel and then run a dry patch through it once! That will remove the excess lube. If you leave much lubricant in the barrel your first shot when firing it in all possibility will be higher than when you zeroed the rifle by a couple if inches. I think for no more than you will probably shoot the rifle you will be fine.
Just shoot it! Sometimes Factory guns come through w/ VG accuracy. Bedding, Floating are not nessesary. Some guns like a little pressure in the front of the stock. Shoot it, post your results and move to step 2. Don't jump the gun.
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