I just checked my ammo stock, and I don't have any Speer .357 GDSB135-gr PD ammo on hand. I'll try to get some--but the weather may work against it. We have good weather here--sunny, into the 60s--tomorrow, but who knows after that.
Another poster here, from the East Coast, may have better luck with weather temps--if it ever stops raining for him. At any rate, we will have it, sooner or later.
Do keep in mind that the optimum velocity for the GDSB bullets is about 850 to 1000 fps; anything faster may result in shedding. The 38+P round is built to run at 850 plus--and tests so far seem to show it running about 885 to 910 or so in 2" barrels. The .357 round should do about 960-1000 out of the same length barrel, and I think it will. However, sooner or later we'll verify that.
Jim H.