At first glance, I would suggest H-414 for powder. It appears to be a good one for the 85-100 grain bullets. Its a good powder that I really like. As for the trimmer guage, you need Item Number 613-928. Thats the catalog number but if you type that in, it should show it to you. Its three dollars and change. Thats the case length guage and shell holder and comes as a package deal. I would get some Winchester Magnum primers. Should be large rifle size Are you going to order brass from Midway as well? They should have them. You could start with a couple boxes of factory ammo and save the brass.