If I can lift it (most rounds) its faster for me to split horizontal. I have a method crackin' rounds that works well for me. If I cant lift it alone, I'll roll up a few huge rounds, 1/4 'em ,then go back to horizontal. With my particular back issues, lifting & standing is MUCH less painful than sitting and leaning forward....even the seat in my p/u leans back as far as it can go!! I would LOVE to sit and split, I just CAN'T. Do whatever works best for you. Thats why this is 'the Land of the Free'. ;-)