That's correct no chainsaw is made for milling.Here is the other thread I started in the chainsaw subforum. Service tech says 880 is not meant to mill?
We've been through this argument several times before but my 880 Stihl Warranty specifically says "saw not to be used with any unauthorised attachment" -all of my mills are homemade so they are obviously unauthorised. It's really up to your dealer to determine how to interpret this. My expectation is that a good dealer will clover this but some cheap skate dealer might not.
But with some precautions its relatively easy to keep your saw from dying.
Did you detune it as discussed many times in this forum?
Whats your sharpening regime look like?
Also don't believe the 25:1 mix referred to in the other thread. 25:1 is actually leaner in terms of gas:air than 50:1 and milling needs a rich gas:mix.
25:1 just ends up putting out a lot more unburnt oil into the exhaust and fogging the air around the operator with all the other garbage that is put into oil to suppress smoke formation.