Thank you for your comment - however, I base my advice on the wording from Hodgdons own web-site notes regarding the loading of Triple Seven -
Quote - 'Seat the projectile firmly against the powder. Make sure that there is no airspace between the powder and the projectile.'
There is no mention of a wad there, nor do you use a wad when loading a .577 Minie bullet.
However, as I said to the OP, please feel free to ignore this.
tac