In about 90 % of TC guns the Short Black Harvester and 250 SW are very very good.
Different bullets some times need different sabot In the same gun that shots the SBH and SW real well the 250 and 300 Gold Dot shoot best with the 300+ Harvester and I have to trim the SBH a bit shorter to get the best results with a 451 dia 240 gr or 130 gr XTP or Gold Dot.
The best accuracy combination for Triumph's is usually the 250 SW and SBH with 110 or 120 gr Blackhorn. Lee