I use stihl semi chisel chain but the best ever on palms I'm unable to find anymore, may have gone out of business.
It was Sabre 2001 profile which was owned by John Deere Corp.
Rather than a point or a radius at the tip of the tooth it had a 45 degree angle, so in effect there were 2 sharp cutting points. It was a very hard chain with little stretch, equivalent to say stihl chain but I cant find it anymore, some say they went bust.
My predominant palm saw is a ms440, and yes I go thru around 1 a year, in a really busy year maybe 2 as they corrode thru to the engine etc.
I've tried many saws but frankly the only 2 IMHO that have enough "balls" to get on with the job, start with a full buried chain in the head of a queen palm without bogging are the ms440 and husky 372 .... so that's the sort of HP you need.
I find the Stihl stands up to the corrosion better than husky and seems to have more torque to keep pulling a dull chain thru a head when fully buried ... the husky seems to want to be in it's upper rpm's to do same.
I had a Shindaiwa 757 is it? It was OK on the ground, a little gutless, stood up to the corrosion excellently but was heavy, unergonomic, crappy carby that runs like chit aloft and frankly compared to the other 2 a POS but it was a start and cheaper.
I also use a 25 for thinner smaller palms like bangalows and alexs but for the bulk it's a 44.
Then there's my ms200T, which is the best a tophandled saw will ever get.
Hope that helps you.
A big tip, where possible knock the heads off whole, cut them last, and the final cut at the stump last as well. Cut as much trunk first as you can. Advantage of having a mini loader is picking the heads up whole.
