Dugaboy,

I have the 140-2 in 375 H&H. Yep, it's tight. I did clean the gun as you suggested, but have used briley grease (special grease for break action guns) on all the bearing surfaces. I wipe down the extierior with a silicon cloth swipe the bores after every 10 rounds with bore cleaner. I usually don't break it down after each session, but will now.
I flinch, so I've worked up some low pressure, low heat loads for practice shooting. Recoil is very mild. I also bought some snap caps and practice with them regularly.