Pistelle X-68 Bore Size or Barrel Length… Which is more important?

In this video we test the Smasher projectile with a Pistelle X-68 with 3 different barrels. We want to see if bore match or barrel length is more important for muzzle velocity and energy generated (Joules). It turns out by doubling the barrel length you can compensate for a less than perfect bore match. The Smasher works well with short miss matched barrels but is optimized with both a bore match and as long a barrel as is practical. Smashers come in two diameters one for a .682” barrel and one for a .686” barrel. Look for the standard Smasher with yellow star logo or the Smasher XL with blue star logo.