I presently own 2 USH in 12 Ga. I use Hasting Laser Accurate 3" shells. With this said, I have had such ridiculous accuracy with my 12 Ga's, that I want to get the 20 Ga. USH and have it rechambered to use the 3.5" slugs from Hastings. Has anyone had this done, and if so, what is your opinion? Thanks.