Well, it says that they use steel-rated barrels.
FAQs cover a bunch of things
www.tungstensupershot.com/pages/faq.asp
"We shoot Tungsten Super Shot only through mass produced guns which have replacable barrels, designed for steel shot.
These statements imply no warranty, only the facts of our testing to date. Tungsten Super Shot is harder than gunbarrels and a shotgun blast is a controlled explosion."
You don't need any choke and you're using #5 and #7, not BB, etc.
"Waterfowl hunters shooting at normal ranges out to 50 yards, are best off with a cylinder tube or skeet constriction at the most."
"We use only the Ballistic Products TPS 1275 wad which we alter by cutting to the proper length and make tangent, rather than radial, slits between petals. The stock wads will result in increased chamber pressures and reduce barrel protection from Tungsten Super Shot."
"Our latest load configurations have been shot through multiple gunbarrels with no visible effect.
In addition, we have shot several hundred rounds through barrels using much inferior protection than we are using today. While these barrels DO have scratches, the bore diameters have not changed by any appreciable amount and we will continue to use them. "
Obviously a specialty product - for now.
Material Density (g/cc)
Steel 7.8
Lead 11
Hevi-Shot™ 12
Remington Wingmaster HD™ 12
TSS™ 18