I recently restored a vintage Savage Model 1895 in 38/55 cal. I have been seatching for the best handload. I have been trying a 264gr cast boolit with gas check and getting ok group of 2 1/4". I'm looking at trying a different powder...Reloader 7. My Lyman Cast Bullet Handbook shows a powder designated as Rx7....is that Alliant Reloader7 or Accurate No 7??? Looking at websites for both powder manufacturers offers no answer. Help!