Back in the 80's a fellow gave me a water damaged box of 500 Speer swaged lead 124 RN bullets for 9mm. Having no 9mm pistol I loaded them in .38 Special cases to use in my S&W 586. I forget the powder charge but back then it was most likely some middlin' level of 231.

Did not have a chronograph to measure velocity but being such soft lead with a fast burning powder they obturated well and were definitely minute of soda can out to 25-30 yards with no leading or other issues. Hard cast bullets probably would not have fared so well but I can't say for certain since that was my only experience with this.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!