"if you have an old scope that doesnt hold zero or just crappy, before you throw it away, take off the glass pieces... They make AMAZING magnifying glasses!!"
I've done the same with old Telephoto Lenses from cameras..Great for reading map details and 'fine print'..
Item...
To get chambers and shotgun barrels really clean and smooth, wrap a patch saturated with "RemOil" around the bore brush, chuck it into a a cordless drill with a section (or whole) of cleaning rod and use it for polishing the interior...Normally about 30 seconds, longer for the full shotgun barrel...Then clean/polish with dry clean patches to remove any residue..
Comes out looking like a mirror and cuts down on the probability of fired cases hanging up on extraction.....And less distortion of pattern with buckshot...