Here is what BuffaloBore themselves say about using their .44+P ammo in Marlins:
"Many folks today want their 44 magnums to be able to utilize the heavy 300gr. and heavier bullets—Marlin has not figured this out. If you want decent accuracy out of our new +p+ load in a Marlin, it will need to be rebarreled with a twist rate of roughly 1/20 inch."
Now you know the facts from the horse's mouth.
