Just bought a 15-22 from big 5 for my birthday. Still waiting to pick it up. I've been doing a ton of reading on this forum and found it to be very helpful since I like to modify everything I own for better performance and reliability. Just had surgery so it may be a little while before I can shoot. That'll just give me time to tinker and get to know my new toy though. Looking forward to being apart of this great forum 
My first question has to do with ammo. I already know that I'll probably run CCI and Federal. But I was wondering what these were used in and if the 15-22 can even cycle them?
Cabela's: Federal .17 HMR Ammunition
My other question is about barrel threading since CA laws suck. From what I understand, the barrel threading law only applies to centerfire assault rifles. Considering that a 22lr is rimfire, wood this be a loop whole? My buddy, who happens to be SFPD, seems to think it would be ok. Only reason I would like to thread the barrel is for the most solid mount possible for a flash hider. I don't trust clamp on stuff and I really would prefer not to weld anything to it. If it is legal, does anyone know of a gunmith in the Sacramento area that would do it? Any insight on either question would be greatly appreciated

My first question has to do with ammo. I already know that I'll probably run CCI and Federal. But I was wondering what these were used in and if the 15-22 can even cycle them?
Cabela's: Federal .17 HMR Ammunition
My other question is about barrel threading since CA laws suck. From what I understand, the barrel threading law only applies to centerfire assault rifles. Considering that a 22lr is rimfire, wood this be a loop whole? My buddy, who happens to be SFPD, seems to think it would be ok. Only reason I would like to thread the barrel is for the most solid mount possible for a flash hider. I don't trust clamp on stuff and I really would prefer not to weld anything to it. If it is legal, does anyone know of a gunmith in the Sacramento area that would do it? Any insight on either question would be greatly appreciated