45-90

[Don McDowell]

Might try 90 grains with a single thick wad. I use the Napa rubber cork wad 1/16 material.
I also find that sometimes the Sc 55 y works better with the .446 and fatter bullets.
And sometimes wiping the exposed patch after you seat the bullets with just a drop of jojoba oil and wiping the oil off the patch with a tea towel can really bring things together.
I've found that with regular Goex 1f cci large rifle primers seem to work best, and with the Olde Eynsford 1f br2 primers work well pretty constantly.
Might not hurt to try a large pistol primer.
Fouling control will make or break a patched load, one needs be mindful on that one.