Regulation: Bullet Weight vs Velocity

[CTDolan]

Quite the concept. I wonder how they seal the space between the barrels, though, to prevent ingress of moisture.

 

[Double BC]

Quite the concept. I wonder how they seal the space between the barrels, though, to prevent ingress of moisture.

Yes, you would definitely want to keep it greased.

Just what i need... one more thing to screw with on my double, like their not confusing enough