CH, my understanding is that the flame-cutting and excursions were with some of the later, higher pressure rounds such as the Casull. I have used it for about 3 years now, in .44 Mag, and holding the pressure under SAAMI max (I.E.<36 Kpsi)---no problems.
I am simply speaking for myself and with my particular pieces, both rifle and revolver.
300-MP is what I'd like to get hold of about 50 lbs of.....
