I sharpen my 350 with the lansky and it works fine a full sized stone may present issues. The 350 (slightly smaller than the 300) can be big in some pockets but not imposible to get used to.

JYD#176
"dein Gott schickte mich zu zerstören"
"Sic semper evello mortem Tyrannis"
"Sometimes the chance of a zombie outbreak is the only reason I need to make many of my life's Decisions." General Delivery