Re: which first
Get the 22LR suppressor first. They usually wind up getting the most use. I now have 2 of the 22 suppressors and a third on the way.
You will not want to use a 223 suppressor on a 22LR. Most centerfire cans are sealed and you can not effectively clean them. 22LR has a little cloud of molten lead that follows the bullet out of the barrel. This molten lead will collect on the baffles and harden. None of the commercially available cleaning solutions will remove this lead. It will build up over time and reduce the effectiveness of the suppressor. Another danger is if you get enough of a lead build-up, when firing 223 the muzzle blast can knock pieces of the lead loose. This can divert the round and cause baffles strikes which ruin the suppressor. This is the reason that most 22Lr suppressors are take apart.