Ken, I talked with Kevin Weaver last night about his 20 Bobcat and he said that H-322 with "The" Powder to use in that case with the 39/40 Gr. bullets. I have some on hand and I'll probably try that. I now have everything I need to put the 20 VTT together except the barrel....I'm really getting excited and anxious to see what she will do..I appreciate all your suggestions and advice.....George