I called Sig Tuesday. Asked about the looseness of my 365"s FCU. Rep says they are all pretty much loose. I rattled the thing into the phone's mouthpiece and she said, sounds about right. Since I see so few of these in stores, cannot compare so I asked if there was something I could do to lessen or decrease the wobble. Well, no relief.
I decided to take matters into my own hands. I took a small piece of Talon grip tape and placed it under the rear of the FCU between it and the frame. Rattle greatly reduced. I then went to the range and shot 70 rounds of some Sig 365 range and personal defense ammo I had and the gun shot perfect. (now over 400 rds)
I compared the 365 ammo to Fed 150 HST for short barrels and did not feel any significant difference.
I decided to take matters into my own hands. I took a small piece of Talon grip tape and placed it under the rear of the FCU between it and the frame. Rattle greatly reduced. I then went to the range and shot 70 rounds of some Sig 365 range and personal defense ammo I had and the gun shot perfect. (now over 400 rds)
I compared the 365 ammo to Fed 150 HST for short barrels and did not feel any significant difference.