Fx Royale question..

Hi, All,
Now that it's colder in California I occasionally hear a whistle from my Royale after I take a shot. It's regulated and I wonder if that's the reg resetting or if it's something I should be concerned about. The gun shoots fine and only seems to make noise the first few shots. I do dry fire a couple times before shooting after storage to set the reg pressure.
Thanks in advance,
John
 
Hi, All,
Now that it's colder in California I occasionally hear a whistle from my Royale after I take a shot. It's regulated and I wonder if that's the reg resetting or if it's something I should be concerned about. The gun shoots fine and only seems to make noise the first few shots. I do dry fire a couple times before shooting after storage to set the reg pressure.
Thanks in advance,
John
Sounds like normal reg noise to me. Some do it some don't. Afyer polishing mine on fx crown it does not. Factory one did.