And I can understand that you buy waxed wads, but I live in the land of beer, so beer-cards are more available and are easely transformed into waxed wads. Besides: when you collect some beer-card and buy a set of punches, you always have wads available in all kind of calibers (and cheap).
They recommend to load BP / over-powder waxed card / soft lead bullet sized to .458"
I've tried that same bullet in the 45/70, but not with great succes.
BTW: for targetshooting it's OK to look for harder bullets, for hunting it's better to use soft ones. (and the soft bullets usually ask for BP or its equivalents)
And I see advices for loading... please take also into account the use of gass-checks or not. They do make much difference.
And as Elvis all ready mentioned: pay attention to the base of the bullet! The front will allow much more differences than the base and when you ruin the base while seating the bullet...
......I like to have my lead cast more to the softer side of Bn-11-13 , over the years can't count the number of different loads and combinations I've tried .
......As for the wads I've got all the cutters and different thickens of papers, but just call me lazy it's too easy to order. . www.trackofthewolf.com/
as I use their cleaner and some of my brass.
...As I told Elvis ,Yes I pay attention to the base of the bullet on my sizing. When the wax happens to build-up on the sizing rod they become lope sided (flyers). I always stand them up-right and look at them on a level surface .
.... One thing I'm gonna try after read here about re-forming the tip of the 22-bullets www.huntingnut.com/ind...mp;t=13812
. Is running some of the cast though the sizer again paying closer attention too the pressure on the sizing .
,,,, Edit,,,,Oops, forgot to mention that the store bought 405-gr I've been using.were supposes to be sized
After using most of this old 500 bullet size box (probably over a 10-yr period)I finally mic.'d them they run .456-.459 . Duh ,I'll check next time . couple thousands can make a difference in some barrels . My old barrel likes the .459's .
...As Vince pointed out on the breathing , also wondering about maybe about the check weld after adjusting the rear sight (Lyman) 1/4 inch , can make a difference on the sight picture .