I use it daily for the past few years, I bought a bunch of it. It is a weird chain imo. Out of the box, in hardwood, it acts like the rakers are way too low. You have to cut just right with it to prevent it chattering or grabbing as well as stopping dead in the cut from grabbing.
Spellfeller mentioned the same thing somewhere here awhile back
I did a comparison on a Stihl 200 a couple years back when it came out.
Compared it on two Stihl chains and a few others.
I did not test it in very hard wood. I think it was birch. I have since then run it in dry elm that is about as hard as we can find here.
Out of the box I think it may be a bit grabby, especially on lower rpms, but after filing and shaping cutter better its very comfortable to run even in hard wood.
I know many that say the same about Stihl's chains.
Its a matter of preference as both can work. We are all different in our preference for various reasons.
Kind of irritating for some as they need multiple chains home to please customers.
I have pm on my 2511. Aside from a couple odd loops, I've settled on semi chisel chain on all my saws. I end up in a lot of dirty stuff, and the semi chisel seems to hold up a bit better. I don't do enough cutting, clean or otherwise to appreciate full chisel speed.
I adhere to the Kiss philosophy and run STIHL RS 3/8 .050 on 60cc and up and PS 63 3/8 .050 lo Pro 50cc and down ... has served me well for years ... STIHL chains are of superior steel and harder Rockwell - I’ve used STIHL chain on Husky bars and it eats them up somethin fierce !
I don't like the 91 Oregon, starts out way too jumpy. Stihl chain is way better, but chain speed, engine power, and AV properties also affect how jumpy it is. I use it a lot, but would much prefer to be using Stihl chain.
Sharpness is virtually infinite, but it needs to be tuned for the task. You can get to a point where it's too sharp, and it just dulls faster. That applies to anything that cuts. There's also a time cost. Sharper takes longer. I don't stress it. I'm not racing or anything, and I'll be sharpening again soon anyway. I do a competent job, and there's certainly room for improvement, but it's good enough. IMO, better than good enough is wasting time.
Magnus if you were cutting eastern USA hardwoods with this chain, like aptly-named Rock Maple, aka Sugar maple, what would you do with this chain? Let it chatter and grab and bounce until you have filed off enough of the cutters every nite for 2-3 weeks even thought the cutters weren't dull until finally the tooth is short enough to be less grabby after one quarter to one third of it has been filed away?