The Firing Line Forums - View Single Post - Combo gun that also supports two rifle or two shotgun barrels?

Bart B. · June 1, 2019, 07:29 AM

Winchester 21 double barrel shotguns have been rebarreled to 45-70 double rifles.

Shotgun ammo has a maximum peak pressure about 15,000 psi. Proof loads have about 21,000 psi. Few shotgun doubles have actions capable of safely using rifle ammo producing 30,000 psi and higher.

June 1, 2019, 07:29 AM	#4
Bart B. Senior Member Join Date: February 15, 2009 Posts: 8,927	Winchester 21 double barrel shotguns have been rebarreled to 45-70 double rifles. Shotgun ammo has a maximum peak pressure about 15,000 psi. Proof loads have about 21,000 psi. Few shotgun doubles have actions capable of safely using rifle ammo producing 30,000 psi and higher. Last edited by Bart B.; June 1, 2019 at 07:47 AM.