135 lbs right now. I just use mine for sandbag shouldering drills (50 reps in 20 minutes). Basically what I think you should do is pick a sandbag exercise and shoot for a number of reps in 20 minutes (like I do). When you hit that mark, add more weight next time. Sandbags are great for conditioning, and they're loads of fun, but if you're trying to replace regular strength training with them, you're in for a suprise. Buy enough to make an adjustable 150 lb bag and start from there.