I have a sleeved double with 2 5/8 chambers that I am wondering about using 12 gauge mini shells for. On one hand, the recoil tends to be milder, which should be kinder for the stock, and the length solves the problem of a 2 5/8 chamber, but on the other hand I worry, is this putting the highest pressure on the part of the gun that was not sleeved and may be weaker? Or am I just overthinking this?