Based on my experience and your usual day, I would say between 25 and 30 of your usual days and you will need to rebarrel unless you never overheat your barrel and have multiple guns to shoot. I have had several three day trips in SE MT on a ranch with 500 to 900 shots per day but always with multiple guns. I don't have the patience to not shoot at targets when they are available so my barrels get hot. I bought my Ruger #1V in .223 used and put over 10,000 rounds down the tube before loosing accuracy and replacing the barrel. I have not reached that round count with my Model 700's yet since I liked the Ruger #1V better. My Rem 700 in .223 has over 5000 rounds and still shoots great.
