If one loop is better I'll copy that in 375 and lp then test those. Considering nk chain on shorter little bars for the board ripper. Beams with a small saw on skinny trees should go quickly on a G555 with a steel boxed straight edge attached.
Snapped my first lo pro chain finally w my 64cc saw, and learned upon replacing it that the chip clogging issue really isn't that bad at 26-30", it's overly dull chain that was my problem. Was impatient with cut speed, pushing harder to get it to go faster and pushed a little too hard and... snap. Still failing in my hand sharpening. The new chain started milling effortlessly on one of the biggest center slabs, self feeding with virtually no pressure and maintaining high rpm's, but I could already feel it slowing down 4-5' into the cut. The next slab was slower and even the increasingly narrow ones going to the bottom never got any faster because the chain kept getting duller. I tried the 2 in 1 hand file on it after the first two slabs and didn't seem to get it any sharper. May be same deal as the first chain, they burned the teeth at the shop, doesn't want to hand file. Need to go to a system of four chains for large logs, switching out after every two big long slabs, and sharpen on the grinder at night.
I felt like teeth were staying reasonably sharp through 5 or 6 slabs on narrower shorter mesquite, but as one would expect on big logs, the small teeth of lo pro don't stay sharp for very long when 16-18 cutters are engaged steadily. There's pretty much no way to get around the fact lo pro is going to need sharpening more often than larger chain in big logs - sub-20" hardwood logs it flies through them so fast it seems to stay sharp longer but when it slows down in big logs to the same speed that larger chain is cutting at, obviously the lo pro is going to dull quicker. If I was milling to sell, I'd probably not bother trying to make lo pro work in large logs. Milling for my woodworking though, it's worth it for the finish to save me extra router slab leveling work later and wasted material.