Six different Pistelle X-68 configurations are chrono tested. Longer and shorter barrels of different bore diameters are used with different projectile diameters. An increase in launcher power was seen at up to 10% more Joules when proper projectile diameter is used with a given launcher barrel bore size. One anomaly, an unexpected result occurred; this is most likely a consequence of me tinkering with my Pistelle X-68 launcher too much. The launcher is not producing as much total Joules as it should be.
