I'm with 80fbody on this...was running these Speed Pro (H116CP) 0.020" over in my 360 for 8 summery-only seasons, so when the weather's nice, you bet the motor went through a bit of a "work out"!

Anyways, pulled the motor earlier this year, all pistons looked beautiful. No skirt wear, no issues with rings, no complaints. I ended up running a 10.6:1 static CR, fast advance curve on 91 pump gas (iron heads), pressed pins.

Pic doesn't tell you much, but take a look, they were clean coming out.