These are very well made products and I own several calibers of them. The problem with the 12 gauge ones is that they are 2 and 1/2 inches, not 2 and 3/4 inches or 3 inches like most of the shotgun shells you would typically use. This leads to some misfeeds when you are practicing cycling your shotgun. I can't find any other manufacturer for these though so we are stuck. If they only made them in the correct sizes, these would be perfect.
This review was written in the old system and had content requirements that are different than reviews written today.