So I’m really kicking myself right now. As some of you have read my bar life threads cutting mesquite in sand blown country in Texas. 20 cords is good bar life. I swapped to tsumura bars this fall and I’m getting 25 probably from them. Just as a test though I put an .058 chain on one and I’ve been running it ever since. I’ve gone around 30 more cords now with the .058 and it’s it’s starting to get loose. I figure I can slip an .063 in it now and go again. I bet I’ve thrown away 100 bars easily over the years.