Winchester 73

[Don McDowell]

I use a thin wad under the bullet
Basically what ever 2 or 3 f you have on hand figure out how much powder to come up about half the seating depth of the bullet set the wad and seat the bullet
Those wcf case necks are pretty thin so a bit of flare is a big help to keep from buggering the case mouths
That rifle probably has a 1-36 twist and a groove diameter .428 or .429