Grinder is faster, more consistent, and probably less expensive (wear on wheel vs cost of file) IMO.For that chain I believe I would sacrifice a file and hog out the gullet by hand to give your grinder a head start.
Out of curiosity, what type of resinoid wheel for hogging? And what do you usually use? (I'm sure you've mentioned it somewhere along the line...)
And check out my new free grinder! Should make life much easier when a good grind is required. I ran the snot out of my HF (or NT?) 511 knock-off until it just wouldn't hold an adjustment any longer. Got some serious mileage out of it, but this AX is on a whole other level by comparison. (You tried to tell me, Philbert.) Got it from a tree service guy whose saws I take care of. He bought it new a couple of years ago. Tried using it a few times instead of his hand jig and Dremel. Hated it. Found it clumsy and slow. Put it back in the box. Stayed there until he gave it to me and I took it out last week..., still like new.
Winner? (Yeah. I SUCK.)
you deserve it !
Lessons? Fix busy tree guys' saws fast and economically for em -- (while they wait, if you can)!!!