Bill, yes the Track of the Shells do expand. I shot some 12 gauge shells in my early lifters(serial#s less than 4000) with black powder. They will not fit in my more recent lifters or top action guns anymore. So they are dedicated to those early guns now. I do have a RCBS 12 Cowboy die set new in the box that "should" be able to resize those I just haven't tried it out yet.
With the 10 gauge shells I have been able to use the shorter 2 5/8" shells in many different guns with out issue.
I do like these shells and have a bunch in both 12(2 1/2" and 2 5/8" and 10 gauge(2 7/8" and 2 5/8"). They are great quality and Track of the Wold sells a nice reloading pamphlet with these that I like as well.
Joseph, let us know what you think when you get a chance to shoot them.
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