There was a thread on this not long ago. I believe it would be next to impossible under normal use based on the data posted on the previous thread. Even normal use over many many years would not actually cause much wear. Note the shot is cased in the plastic wad until it leaves the barrel preventing the shot from doing much wear. Remember shot is made from lead and is softer than the steel choke tubes even if it did seperate from the wad early.---Matt
Pretty much indestructable if you don't abuse them, particularly in the 28 and .410. Usual problems are cracking the 20 ga. chambers with high pressure loads and bending the ejectors when they are dirty and/or not properly lubricated. Ron
Assuming you are talking about skeet tubes, not choke tubes. The Briley skeet tubes have a life time warranty even if you are not the original owner. They will shoot loose after a while. A temporary fix is to use some clear nail polish on the chamber, opposite side of the extractor. When that no longer works, Briley can install a stud to tighten them up again. Extractors can bend or break if you are not careful. Shoot low pressure loads in the 20 gauge or the chambers will crack.