Now that I've got a local source of Dunlop Ultex picks I've gone back to that make and material in the .73 guage, and occassionally .60 guage. I either use the dull rounded corner or I round off the sharp point to match. This material lasts much longer for me, seems to have more snap on the fast or percussive tunes, and sounds smoother on slow tunes to my ears. Because they're smoother than the Dunlop Gators I was using for so many years, I will rough the gripping surface slightly with fine sandpaper, but usually only on one side.

I've flirted with very heavy picks on mandolin in the past and though they're okay for melody playing, I find them less than smooth on chordal things, including doublestops.

I dislike changing picks for every instrument, and I find the Ultex perfect for everything. Results will vary according to a variety of factors like angle of attack, choice of strings, type of mandolin, repertoire, technique considerations, and so on. Make sure the pick edge is smooth...I shape, buff and polish mine, obsessively.

My 2 cents (Cdn).

Peace, Mooh.