try heavier and slower. also the 434's should help. marlin 44's are notorious for being fussy about diameter. also try some trailboss if you can find some. i had 2 1894 marlins made the same year. one loved jacketed and the other wanted cast. i also recrowned both after getting them to both work with either style bullets and with the recrown, both shot groups around 1.75" at 80 yards. traded one off but will have a hard time letting go of the keeper.
don't despair you can get yours to shoot well.

the consolidation of the states into one vast republic, sure to be aggressive abroad and despotic at home, will be the certain precursor of that ruin which has overwhelmed all those that have preceded. Robert E Lee
~Molɔ̀ːn Labé Skýla~