Going to the range tomorrow with a life long old friend of mine. I was scrounging the ammoe locker to see what I had on hand to take out, and came up with 100 rounds of 30-30, 170gr. Lee, loaded with 5.0 grs. of TightGroup. This should be a sub sonic load at about 1050 fps. Fun stuff. I've noticed when shooting these and others loaded with TG, of how quickly the barrel heats up, and it got me thinking. Is there any concern with premature throat erosion in our rifles due to using a powder that burns so hot? Should I be loading with a different powder that burns a little cooler for these light loads? What say the collective?