Quite by accident, I found a rather weird way of pulling cast boolits. I had some Lee .452-230-2R-TLTCs loaded into .45 ACP cases. I failed to size them and they wouldn't chamber. Dang! On the off chance it might work, I pulled the decapping pin from my carbide insert FLR die and pushed one in. It sized the case down but, it also compressed the boolit. The brass case "sprung" back a little and the boolit almost fell out!
I haven't tried this with any other calibers. I feel sure it would work fine on other straight wall pistol cases, rimmed or not. It might work on tapered cases like .38-55 or .45-70. I have my doubts about shouldered cases. I'm thinkin' it would fold the shoulder.
Anywho, it beats smackin' a bullet puller against a wood mallet and havin' to open the puller every time and then retrieve the boolit from a catch pan.