I know it sounds like a lot of powder, ie: 70% starting load to 100% of loading density for max load, however TB is so very light though, and 'fluffy' fairly large donuts of powder.

I'm sure the #2 will shoot it just fine.

In the .375/06IMP, a full case drove my 310gr. plain base bullet to 1,380fps - bit more powerful than a black powder .38/55 load.