Call S&W and they will tell you how to go about shipping it back. They will pay for it if it is a defect in the rifle. Good luck.

How can I get my S&W handgun repaired?
Please contact our Customer Support Center for instructions on how to return your handgun for repair: 1-800-331-0852 (Inside USA) 8:00 a.m. to 8:00 p.m. Eastern Standard Time (Monday - Friday). Customers outside the USA may contact the International Warranty Service Center nearest you.

Before I'd recommend sending it back, I'd try it with at least 3 types/brands of ammo, and using three or more magazines (preferably mags known to be reliable in other, similar weapons).

Cleaning alone may not do it; you also need to make sure it is well-lubricated. Friction, especially in a new semi-automatic firearm, can cause slow cycling and many other related functioning problems, so lube it well for best results. After it is broken-in, you will probably be able to reduce the amount of lube needed for reliable functioning. My older Colt AR can run nearly bone-dry for 100s of shots with no problems.

So I finally decide, I'd take it to the gunsmith have him look at it once more before I mail it off. He took a look and decided to shave down/smooth the teeth to the chamber or the feed ramp as being a brand new rifle they were 90degree angles or very sharp angles. Anyway, I took it out today to shoot, it does jam like that about every 10th rounds now, in other words a hell of alot less, I feel at this point it was just a break in issue and the rounds were going to smooth that out over time anyway, I just sped it up a little. So not going to mail off to S&W just yet, I'm going to put another 200-500 rnds through it, if it still does it considerably after that, I'll once again consider mailing it back. Thanks for the input people. Appreciate it.

I sent a pistol back to S&W. It went well. I got it back fast. They will send you a pre paid postage sticker for UPS. It will cost you nothing. Once every 100 rounds would be too much for me.