I have 5/16 copper tubing trims from fridge business, I am interested if anybody has experience to make jackets for 9mm using 5/16 tubing?
in my case they come in two sizes, 5/16 x 0.016 and 5/16 x 0.02
If I understand correctly, 0.02 wall can be resized down to 0.014 and thus increasing diameter to 0.343 or about.
I am newbie to the topic, so any information/tips would be helpful, thanks