I am the owner of 3 Tactical 22's. The S&W 15-22, the PUMA PPS-22 (made by Pietta of Italy) and as of this week, the SIG 522.
I am afraid that the SIG 522 is head and shoulders above all the others in terms of reliability. It shoots ANY brand of 22's without a burp and shoots every time. It is also easier to clean since it is easy to remove the hand guards without any tools. So while I still like the S&W and PUMA, I would rate the SIG as an A+, the S&W as a B+ and the PUMA as a B.
FBB
I am afraid that the SIG 522 is head and shoulders above all the others in terms of reliability. It shoots ANY brand of 22's without a burp and shoots every time. It is also easier to clean since it is easy to remove the hand guards without any tools. So while I still like the S&W and PUMA, I would rate the SIG as an A+, the S&W as a B+ and the PUMA as a B.
FBB