Here's my 2 cents....
Be CAREFULL!!! Tungsten (TSS) shot is much harder than the steel that your gun barrel & choke is made out of.
"Don't Over CHOKE" the tungsten (TSS) shot. Lead shot deforms when shot for a shotgun and Tungsten shot doesn't deform.
A good source of reloading information is Ballistic Products.
Another good source is Indian Creek Shooting Systems, I have emailed them on what choke diameter that they would recommend for #5 TSS shot and they were very helpful.
Indian Creek Shooting Systems