The other thread has my BX lifting a 4x4 round bale with the FEL. normally this is on the 3pt with a hay spike and I have 0 issues. I keep the FEL on for counter weight of the 3pt, and go slow and keep it on relatively smooth ground and it doesn't feel tippy at all. So in a word YES it can do it and you do not need to get an L series, but I would think of how often and how far you are going with a round bale on the tractor. I generally only need to about 400 or so feet from storage into the horse paddock and I am only doing this once every 2 weeks.