I'm loading'em over 55gr H4831sc. Shoots better than I can out of my old sako finnbear. I don't recall the OAL, I measure them at the ogive at 2.718". That's run out there pretty close to the lands, don't have my records handy. Probably limited by neck bearing surface, as has already been said. Start a little low, go a little slow. Be safe, we don't need any more bad publicity.