I got the Tech T bolt matched with the stock barrel as well and shot 316 first few shots. Blew the paint into spray on the 2nd ball. I adjusted the velocity and have been shooting Valken Infinity with lots of success.
Fragile paint is very unhappy in a TPX. Sadly I get a lot of bounces when I really need the eliminations. Played last weekend shot 5 people only took one out. I'm going to try smaller more fragile paint next but I heard that the stock barrel is pretty small as is. Anyone know the bore size?