We do household, stove length firewood, 16-18", all varieties. We get a nice production flow out of a Timberwolf 6, with 6-way slip on. Customers like Finished size is 2-8" cross section, some to start the fire, some to burn it slow. Maybe 70% of our rounds can go straight thru the 6-way, some in several passes, and done.
Tricky parts: Bad rounds need to be thought about before pushing the 6 way. Wedge tends to pop off if pushed hard with crooked end cuts or bad grain, or damp conditions. Wedge needs to be quickly removable before you push in a bad round, like with crotches, crooked end cuts, bad grain, over 30" dia. Better to settle for one clean split on a single wedge to start, than get a bad round stuck in the 6 way wedge.