Actually Hornady does make shockwaves and Hornady SST's. Shockwaves are marketed under the Thompson Center name. They are the same bullet, different colored polymer tip, and different sabot. If you try and load a shockwave in your rifle and it loads hard, try going to an E-Z glide, Harvester Crushed Rib, MMP HPH-24, or their three petal sabot. They will make hard to load bullets much easier to load.

When I first got my Black Diamond XR I purchased SST's. Broke the short starter that day trying to load them. Of course back then there was no thinner sabots on the market. Bought the T/C Shockwaves, and they loaded fine.

The XTP is their hollow point bullet Hornady makes. If they have a polymer tip, they are sold as a PTX bullet which is a H XTP but with a tip in them. We used to get them in bulk and they too were great shooters. You don't see them in bulk much anymore.

If I had a new Triumph, like Doegirl said, I would get some Shockwaves and some XTP's and try them with 100-120 grains of loose powder. I think you would have some excellent groups with that rifle and those loads.

While Powerbelts do shoot well in a lot of rifles, I think there are much better projectiles out there for the money. If I want to spend almost a $1.00 a bullet I would look at some Nosler Partition instead or something like that...

Just my opinions of course.