I have a Stihl 291. I cut firewood for us for the last three years and have been pleased with it. I did discover, having been ignorant, the yellow RS chains cut hardwood much better than the one that came on it,green. Anyone with a lot of experience have anything to add about chain selection. I’m going to get a fresh new one to tackle a huge blown over oak.
maybe not a lot but I found what I like and how to make it work for me
https://www.baileysonline.com/chainsaws/chainsaw-chain.htmlI like chisel chain , and the first argument your going to hear is , sure but it dulls faster
chain in sand , rock , dirt , ect ... dulls faster is a little misleading it isn't like you can stick your tip in the dirt 3 times with a chisel and 30 times with the semi
it might be more like the difference one run through he dirt vs 3 which I guess is 66% better
if you keep your tip out of the dirt and are cutting clean wood that wasn't skidded all over in the mud you can cut for several tanks of gas on a sharp chisel chain so why give up cutting efficiency. you can touch up your chain with a file after 3-4 tanks of gas and just keep going.
in Stihl terms
the Green RS is low vibration low kick back , you pay for lower kick back in cutting efficiency
the RM yellow has the warning for kick back
honestly both can kick back , it is like thinking there is a big added safety when only a little one exist , if you go prepared for potential kick back which is mostly just use good cutting form and watch your tip.
cutting speed is a function of 2 things chain speed and and chip size.
chip width doesn't change how fast you cut down , chip depth does so you see some bar chain combos for lower CC saws with a Narrow kerf so it takes less width to get more depth of cut less total wood displaced but all the wood you need to get through the log as long as it isn't a big one
you can tune your chain to the wood , you will see raker gauges that have a hard and soft wood slots on soft wood you can take a deeper chip than in hard wood without slowing down chain speed
so if you play with your rakers a bit you can find the sweet spot as fast as you can cut in your wood , green vs dry , hard vs soft all make a difference , if you try to take too much off at once it loads down the saw , take to little and you have a fine saw dust
it is called pulling chip for a reason you want to pull nice chip without bogging down the saw.
if you pay attention to the pitch of the sound your saw makes and keep the rpm up but keep pulling chip
bar length will play into it also the more chain your pulling the greater the load
say your cutting 16 inch wood and you have your 32 inch bar on , you have the same number of cutters in the wood with the same gauge chain be it 3/8 or .404 ,now if you have a saw that confidently runs a 32 in bar you probably won't notice much but if you know your going to be buckling <18 all day and you have an 18-20 inch bar you might want to put that on , it is also fewer cutters to sharpen and less expensive chain as well as being a little less drag on the saw
however if you run a 20 inch bar on your 50cc saw and find if you try and dig the dogs or push it bogs down , a 16 inch bar might make it cut faster for you and keep those RPM up and let you take a little deeper chip.