I am a 44 mag shooter and have tried just about every modern powder to stuff in there accept Little Gun and HS6. But after all the testing and powder choices, 2400, 4227, Blue Bot, AA9 perform great but all a shade under the H110 in my Marlin. so I am considering just shooting H110 and letting the rest go. Just pondering.
I will also say that performance with AA9, wc820, Blue Dot, 2400 and 4227 have been great and I wont quit using them, but I am considering now just consolidating to H110 when I buy for the 44 in the future.
*I have no issue with 296 however it is just a tad more expensive than H110 which makes 0 sense