Hi Joe
If standard s/w shiplap then it will sink the nails below the surface for sure. (It's a great nailgun btw, just done a roof with mine and so much better than the Paslode I had previously.)
Is there anyone in your area with one to try or maybe a dealer to take a peice to for a demo? I don't know where you are but I'm in Northumberland and have plenty of 50mm ringshanks.
Bob