What is Nitro Proofing

[joesikora]

What is Nitro proofing and how much does it cost?

Thanks

 

[Weiserbucks]

If you don't even know what it is why do you care what it costs?

 

[Homer]

it basically means it's been shot....

 

[eelgrass]

It can cost you a finger or more if you do it wrong.