I wouldn't be surprised as battery technology continues to improve that in 10 years 25% of saws sold are battery.
My .043 gauge bar got worn on my Echo 58V saw so I bought a 56 link, .050 gauge 3/8" chain and put it on. It was a little big snug in the bar groove at first but the sprocket ran it just fine. It put a little bit of smoke off the bar from the bar oil for just a couple of seconds, but then it ran itself in. I could have just bought another bar but I wanted to run the heavier gauge chain anyway. The second .050 gauge chain I put on didn't put any smoke off the bar at all. It fits like it's supposed to now.
It's easier to find the .050 gauge chains, also.
You might try that when your bar loosens up.
