I never tried using the Vihtavuori powders before. Well, today I did. I was able to get n340 and 3n37. I loaded 50 rounds of each behind 230 grain RN FMJ. Shot them out of my Sig 1911 and Glock 30. They both were extremly accurate. 4" groups @ 15 yrads. The 3n37 metered nicely! They were a pleasure. Some guys load one powder and stick with that. Im an experimentalist! I try everthing that works. In stock, I have many of the most used powders. I just needed to tell you all these 2 are real nice!