I'm wondering which really has more or less friction: reballs or paintballs. Under ideal conditions, paintballs seem pretty hard and slick but get them outside and they change. The shells are made of a gelatin, which is a type of food product. Heat and humidity start to get to them and they get softer, which increases the friction coefficient and, IMHO, is the main cause for barrel breaks when bore sizes are too tight. I also think that paintball shells have a tendency to stretch and tear more than reballs. So I'm thinking of doing his tests twice. Once with room temp balls and the other with softer balls that have been outside and in the shade (just like at a field) for a while. Also, I don't know which has more friction against aluminum and steel. Perhaps the materials of the reballs and the paintballs have different amounts of friction. There's a lot of different things to consider between the two and I think the best way to find out is to put them to the test.

Using the same reball is kind of interesting but I'm also worried about wear and tear on the ball. Like you mentioned before, the reball insert you used received scuff marks because of the tight fit. That means the ball left mass on the inside insert. The same thing may be happening with my balls and insert as well but I didn't think to look inside it. If the same ball were used repeatedly with the same tightness, the diameter and shape of the ball may change when shot many times. If that occurred, the performance would change as time went on. I'd have to take a caliper to it before and after testing to see if that is what is really happening.

Great, I got 2 more ideas to test out. LOL.

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