If those were mine I would load then into 38 cases with a light taper crimp. I suspect these are soft lead so be prepared to do some lead removal from your barrel if you get the velocity a bit too high. Frankly I gave up on lead and switched to plated bullets years ago.
Lots of people worry about taper crimps but I shoot tens of thousands of plated bullets both 38 sp. and light loaded .357's using a light taper crimp. I have never had any issues at all. In fact, a heavy taper crimp will cause a lot more problems than a light one.
YMMV, my 2¢