Mine is going to be AT least 420 lbs. I have that much metal saw dust from work saved up so far. It's in a bunch of army surpluss duffle bags. It takes 6 to fill my punching bag, and I have 4 1/2 bags so far weighing 90-100 pounds each. Another bag and a half, and I should have close to 550 pounds, "Maybe" as much as 600.
What do you guys think?? Could you put a bag THIS heavy to work?