18" barrel and TSS?

I have a Winchester 1300 pump 12 ga. I'm wondering if TSS #8 or #9 will shoot good in it. It has an18" barrel. Also I have all the factory chokes plus some custom chokes that I've used in it for a few years. What choke do you recommend for this gun?

That a short turkey model 1300?

A few years back it was the NWTF gun of the year. It shoots 2 3/4 & 3 inch shells. It is also called a 'speed pump'. I'm anxious to see how it will perform with TSS. There have been no modifications to the gun.