Thanks. So the camera is actually connected to the camera (or computer) via a hard wire? I thought some models used wifi or blue tooth or green ear or some other hi tech terminology unknown to this old codger?? It would be beneficial in my instance to be able to cross-connect to both phone & computer but what do I know. I'll answer that...not much.Works fine with my Samsung S8 phone. Download from Google play store is "Teslong HD". Just plug in the camera using the provided adapter, allow the app access to camera and storage and you're all set.
Here's a nice picture of the bore of my Marlin 1894... Very nice tool marks! Still shoots great at 25m though!
Back to your pictures. Amazing. Just proves that the scope will not tell us whether a barrel will shoot or not, just whether we're getting it clean or not!
Your pictures bring up another question for any machinists among us. What the heck causes those (amazingly uniform) machine marks in the grooves. I never had given it a lot of thought and just figured that they were just a chip caught in the drill bit, but if that were the case they would be on the lands, not the grooves.
Can't believe they are chatter marks from the button; could it be the steel used in the barrel caused by chips breaking off as they curl up in front of the cutter?? Whatever caused them they are amazingly evenly spaced and obviously have little effect on accuracy (in this case, at least).
Thanks for your answer and pictures, WS.
Regards, hps