It may say 17hmr moderator on your FAC but SAK are suitable for both calibres, I have just put a new one on my 10/22 and apart from the noise of the action cycling theres no much noise at all, the internal baffles of a SAK are aluminum and even after a few hundred rounds they get seriously crapped up, you have a few choices 1. take apart and clean yourself. 2. Send back to Jackson rifles they will refurb it for you. 3. Go to a gunshop and buy a new one. I use one on my HMR as well and its not too bad on that. atb Roy