I may have posted this before, but this process works, and combines several skills you already have to produce jacketed 240-grain .44 Remington Mag bullets from pure lead 40 caliber slugs and .40 S&W spent brass.
Watch Mannyca's video at https://www.youtube.com/watch?v=TC2Ad3k3kgg for exact procedure.
I've done this and it works. My old Rock Chucker handled the stress just fine.
Here's a summary board I made showing the process:
Manny has moved his channel to https://www.bitchute.com/channel/eNHKe2S3e6YZ/
Just be very sure to anneal the .40 S&W brass so it's really soft.