I have a cz 527 varmint that shoots 40 - 60g ballistic tips very accurately, the 50 s particulary well (literally ragged 5 shot groups) 25g n133, 25.5 benchmark 27.5 blc + a couple of others, iwas given a couple of boxes of the blitz (1340) not the blitz kings to try & could not get them to group well at all 11/2+" , could someone recommend a powder, charge to suit or is the 1-9 a bit fast for the round