I appreciate you bringing your 3/8" conversion to front. I run .325 .058 on the 346XP, and was considering beefing up to a 3/8, .058 and here, that's what you've been running for a time now.
Your insight helps my trial along without actually having to do it..... you've been there, done that.
On another thread we were discussing sticking a carving bar on a 346XP, and I volunteered to buy the hardware and give it a whack. The question became whether to use as 7 or 8 pin sprocket.
I was going to run the 3/8 low profile chain on the carving bar 346, and run 16" 3/8 .058 full-chisel on the other 346, kinda giving opposite ends of the chain ferocity spectrum.