for a long time i used the card ,,,with good results
then i switched to the ldpe,,,with a little better results
This data is for black powder
if you are going to put all the driving bands into the case it will take a lot of compression,,,be careful,, you will bulge the case with to much and the cartridge wont go into the chamber
i also finger seated the bullet and left the top groove and driving band out of the case
if you are going to hunt with this bullet you can kiss the crimp on the second driving band to snug the bullet
not sure what powder you are using or how much,,,,but you should drop it through a drop tube to help settle the powder in the case to get more into the case,,,it will help
lyman also makes a really good IIRC 425gr, flat nose bullet that i like to hunt with,,way better than the 405gr.
for long range stuff look at the postell design,,, flies a little better out there at 8-1000 yrds
i can get the mold nos. for you if you need them
either one of those wads should give you good results
ocharry