LOL, they should have just used a 10.x space instead if they wanted slightly simpler numbers.
On the shotgun, or adjacent, I do tend to prefer ammo classes for my nets... 10.22.x.y, where x may be 1, 38, 45, etc. Allows for site to site vpn with friends/family a bit easier to remember.
I dunno, seems like it could be a bit vague. Does 45 refer to 45 Webley or 45 GAP? Could possibly also refer to 45 Colt I guess, if you're boring. But 45 Colt, 45 ACP, 45 Colt Government?
Also, just in case this comment isn't pedantic enough, 10.22 would be a firearm range, not an ammo range. And AFAIK they only ever chambered that for .22 rimfire cartridges. ;)