Keep the meat cold. I run the same grinder and will say that a single pass is fine and a double grind is not needed.Ok, after a day postponement I just ground the beef for tomorrows sticks. Two grinds, big plate than small. LEM #8 Big Bite. I froze all the parts first, and perhaps didn't have the beef frozen 'quite' enough. First time through, no ram needed, all the pieces fell into the machine. But second time through, I had to stuff the coarse grind through to run the fine plate.
Also, do not freeze the grinder head and parts. This will just cause the meat to stick to the metal, just like your tongue on a flag pole in winter. Instead make sure the meat is cold ~32* BUT most importantly make sure you lubricate the flange on the back of the auger before assembling. There is a nylon bushing in the grinder body that the grinder rides on in the back, nylon and steel equals friction and obviously heat. You can lube with Crisco but grinder assembly lube is best.