jbar174
If you bought a package deal of Hornady XTP's and sabots, you more than likely got the MMP HPH-12 sabot. This is a thicker sabot supplied with the Hornady bullets. Even if you picked up a package of Hornady sabots you would still have gotten the HPH-12. Hornady is now packaging a red "low drag" sabot that is really a MMP HPH-3p-ez for easier loading.
Since you are shooting a TC Triumph - i would suggest you try MMP HPH-24's or regular Harvesters first if they are still to tight then try move down to the HPH-3p-Ez which is slightly thinner than the 24. As a last resort then go to the Harvester 'crush rib' - that is the thinnest sabot out there at the present time.
You just do not want to thin of a sabot that would lead to pressure loss. It should be snug going down but not so loose you can easily with a couple of fingers push it down the barrel.
One final thing it will be very difficult to tell the difference between the HPH-12 & HPH-24, they are bot both black and constructed the same way. So when somebody says black sabot - there still is information you need.