I use an Oregon S50 for my Remington electric and the D70 for my old McCulloch 610 Pro gas saw and no complaints with either. Its pretty hard for me to mess up a blade when felling a tree but once its down and being cut into logs I can do a number on it. The most frequent damage to sharpness comes when the tip hits the ground because I haven't lifted what Im cutting up high enough not to do so. Unbelievable how little it takes to dull the cutters after doing so only a few times so I always have a few spares on hand to swap the blade out quickly and sharpen it at some later date. I have a few wood stoves so cutting down dead trees on our few acres is worth the few bucks this chains cost. I do have some pretty large carcasses to cut and they're larger than the length of my chainsaws so it takes a lot of cutting around it before I have a log to split. This comes nice and oily and ready to go in about the 5-minutes it takes to pull of the old and put on the new and much better than stopping everything to sharpen one. I try to cut the stump even with the ground and thats another major dull practice that I try never to do with a recently new chain so having a sharpened old one for whats pretty much a single use is nice to have handy since Ive even cut through bard wire thats been embedded in a stump.