RE: Which Roundball?
When we casted up a bunch of the .535 for my friends and I you would have enjoyed the video had one been made. Here we were, all excited about shooting them and had to use a club on the short starter to set them and then push the ramrod against trees to get the thing on the charge. Needless to say we only shot a few of them off that day. But you're right, what ever fits the tightest will usually give you the best group.