True up your cast and paper patched bullets

[Kurt]

Jim I'm with you on uniform diameter PP bullets and a bullet that is a consistent snug fit 100%.
A bullet that is tight enough that you need a tool or even a hard thumb push to get the breach closed your changing the load performance by changing the compression of the powder and bullet release. This might make a big difference at long range or you might only loose one scoring ring, but that loss of one ring might loose you first place on the leader board. Back when I used the Goex Express powder giving it .300 plus compression it did not make any difference on the powder compression using a seating tool but it changed the bullet release. Using a lightly compressed powder load like one might use with Swiss or the OE powder the added compression seating a tight bullet makes a down range difference.

When I got my new Douglas barreled .40-65 it has a very tight undersized bore and shallow groove from the common .400/.408 I could not seat the round with the thumb that worked fine for the .40-70 Shiloh, the breach block had to finish seating it and I had holes all over the paper because the bullet was to large in diameter. This would have been OK maybe if I seated the bullet deeper in the case that I could work up another accuracy load at the cost of powder capacity that would effect downrange performance so I ordered two Lee push through dies and also a proper diameter mould and the difference is plain on the down range target that I did the right thing.
If you have a ugley bullet you will also have a ugley target.

But pay attention on how much you size the bullet down. sizing a .4023" to .4005" will increase the length of the bullet and also change the ogive to a shorter length. This might or might not make a difference on accuracy for your particular load.