Eric, I bought lead bullets like Kirk but I diddnt want any lead dust leaking out by my kids. So I had Ty at Flexible Alternatives (
tyb@flexalt.com) make some heavy duty bags. I easily put 300 lbs under the seats in the bow.
He can make them any size you want, put a fitting in the end and you can put your own lead in it if you want.
He also made a custom locker sac for our V210! I specified the size and number of fittings etc.
Good luck!