The Hodgdon site only lists a mild Trailboss load for that projectile. While I don't use that projectile. However I am using a 255 grain Westcastings lead SWC which isn't that diffrent. The load I'm using is 26 grains of AR2205 (sold as Hodgdon H4227 in the USA). Not a full house load but still packs a punch. The projectile has one of these modern coatings which doesn't lead up the barrel.

Have just bought a chronograph and hope to measure the velocity next weekend.