I purchased a new P320C-357-BSS. This is my first P320 Sig pistol. I do have many other classic Sig pistols.I field stripped, cleaned and lubed the new P320 according to manual instructions. Put it back together and did function checks. When I do a trigger check there seems to be a rather dull clunk sound or feel vs a sharp click sound or reaction. Is this a normal thing for a Striker fired Sig? I have not tried any live fire yet. I hope I am worrying about nothing What say ye P320 owners and brain trust?

This is normal for my 320's. Shoot and enjoy!

Does it feel like the trigger is dead, as though it's not doing anything?

If so, reset the trigger mechanism. If you raise the slide stop lever, you should hear a "click."

You can verify function by ensuring the chamber is empty, pistol is "cocked," and by placing a pencil in the barrel. Some say eraser in the chamber, I find it works best with a new pencil, the other way around. Point the muzzle up and press the trigger. The pencil jumping into the air verifies proper function as the firing pin on the striker hits the pencil.

If you do this and the pencil doesn't jump, the FCU has not been rest. Lock the slide back or hold it back and raise the slide stop lever (slide release) a couple of times, listen for the click. Repeat.

Thanks for the answers, SIGWALLY and sns3guppy!
I am very confident that there is nothing wrong with my pistol now. I did as suggested by guppy, and the pencil jumped out of the barrel and almost hit the ceiling! Not being familiar with the P320 platform I did have some concerns. I am looking forward to some range time with my new Sig. Thanks again for the help. The wealth of knowledge on this fine forum always amaze me.

Good deal. Sounds like your pistol is functioning just fine.