I purchased a custom PG .665 for my Rem 870 SM 26" bbl last season and I haven't even shot it yet.  I've been so in to the 20ga for the past two seasons, I never tested it.  I realize the standard PG for rem is .670, and I see lots of folks love it.  What would you say would be a good load to test with this .665?  I doubt it will beat my JH .660 352 in a 10" with H13 7's, but I'm just curious if any of you have purchased the pg .665 and what was your results?