IIRC he talks about the Colt .45 SAA that he blew up in the article I posted a link to, if not it is one of the other ones. He blew that Colt SAA 45 up when he used a .458" inch bullet that he swaged down to fit in the .45 Colt case.
To the poster who asked what I call a safe load; A safe load to me is one that is within the specifications as set forth by SAAMI for a given cartridge.

I know EK loads may seem hot however some still exist in curent manuals. In the case of the .41 magnum 19gr of 2400 with a 210JHP is still listed as maximum in two current and well known manuals, and 20gr is listed as Max in another well known, current and respected manual with their 210gr JHP. If these laods are safe with a JHP which causes more pressure compared to cast bullets then they should also be safe with a like weight bullet.