Hello. I think, based on experiences/testing, of other Corbon DPX loads that it will probably be "up there" toward the top of "the list" of good performers in the .38 snub. Frankly, I believe that the non-defunct standard pressure load would have been except for one thing; in some of the snub revolvers I tried it in, there was evidence of the bullet barely precessing around its lateral axis, ie, slight keyholing at 10 yards and out. It never did this in 2 1/2, 3, or 4" guns so I suspect strongly that the velocity was just right on the edge of that required to maintain stability. I've never seen this in print nor heard it from Corbon, but it wouldn't surprise me if the +P wasn't created to completely eliminate that problem and I think that it will. I bought some of the .38 +P, but just flat have not had time to test it.
Best.