I loaded the martinis with accurate xmp 5744 32 gn on a pp . to .470 .458 bullit 500 gn, or a .470 HB 480 gn from lee ,works very well to me , but sinds accurate is'nt available anymore here ,I use vitha N110 27/29 gn on 386 gn PP to .470 458 gn bullets allways use 2/3 gn dacron on my loads or a poststamp toiletpaper or kitchenroll
use same loads in the NSW alexander henry falling block , also use n120 34 gn but with magnum primers
burningrate of xmp 5744 lays between vita n110 and n120
all my BPCR's are loaded with these powders I have no experience at all with BP ,all my loads are mild and give no signs of overpressure (,I dont like kicking or jumping rifles)
reload for 40 differend rifles from the years of transition
greetings from over the pond
jarmann