Shooting them?

[OH Osthaus]

a proof load

http://gunproof.com/Proofing/proofing.html

correct, its not about seeing if the barrel blows up, there are many pre and after proof measurements that are taken and compared to make sure no changes occurred

a single large load, but be aware there are no proof laws/standards in the US

each maker had their own procedure

[Ron Scott]

Originally Posted by Rick Losey

a proof load

http://gunproof.com/Proofing/proofing.html

correct, its not about seeing if the barrel blows up, there are many pre and after proof measurements that are taken and compared to make sure no changes occurred

a single large load, but be aware there are no proof laws/standards in the US

each maker had their own procedure

Thanks -- Interesting site even though very vague on the details of how a gun is proofed.

[Drew Hause]

“Birmingham Gun Barrel Proof House at Work”, 1951
https://www.youtube.com/watch?v=f3aHnxsj7y8