I generally use a smallmallet and gentlytap, tap, tap thebulletdown the bore.
When loading, there'sreallyno need to repeatedlybeat upone's palm unnecessarily.

Ihave a coupleof these inexpensive CVAsizers which areprobably longdiscontinued.Their diameters averagebetween about.503 - .506 because they'relower quality andnot perfectly round. I suppose that the sizer could deform a conical since neither end is more open than the other, butusing itwould still probablybe more preferable thantrying to load& shootanoversized bullet.
I haven'teven tried one of these out yet to see how well it works.