The 452423 a 238gr SWC was designed for use in revolvers, loaded into .45 Auto Rim cases.
Both the 452423 and 452424 have similar meplats, so I "think" a #424 top punch should work.
Thanks for taking the time to check.
____________________ I used to have a handle on life, but it broke.
#452423 is one of my favorite bullets. You can use the Lyman recommended 424 top punch, but it just acts as a flat punch, modify any punch in a lathe to be flat, or use the 374 which pushs on the sides of the nose but not the melplate. HTH, Ric
My old Lyman Cast Bullet Handbook lists the 424 top punch as the correct one for the 454423 bullet. That's the one I use, and have been using for over 30 years. Incidentally, the 452424 bullet apparently hadn't been offered yet when this handbook was published - it's not listed.