Guided in B.C. a few years. One doctor from Ohio brought matched Weatherby's. Only once did he need to swicth after he fell and hossed the scope. His reasoning - and I will not argue - stay the same make/model so you have nothing new to learn. On several long trips I carried two and have never had to take the second rifle out of the case.
Now at ATA I have used spare triggers, gas seals, firing pins, yadda, yadda. But we are talking 100s of rounds versus a very few. One trip to the Yukon I fired three shots, from one of two 7MMMs, at Ptarmigan to sweeten the freeze dried fare. Won the Club trophy for the member "who went further, spent most and shot least!" Won it the next year, too, but the trips were great!