44Steve - Nope, I only shoot off-the-shelf ammo. In the case of the 329, I shot 6 rounds of Buffalo brand, and 6 rounds of Winchester. All 12 spent casings had to be pushed or pounded out from the front of the cylinder. The Buffalo *felt* like it had more recoil than the Winchester...but that's just a gut feel. I just looked at the gun and see no lines or markings at all on the cylinder.