Which shop? I was at B&B in North Hollywood, same one LAPD ran to for ARs during the bank robbery. I was the warranty/special order manager and yeah, lots went back.
Curiously, the example I've shot war MORE reliable with HydraShok than ball; the ball bullet profile appears to be right at the dimension of the curvature of the ramps, while the truncated cone of the HSJHP seems to work no problem, go figure.
Not only that, as a first time firer of the Break Up, all my shots went into a rectangle roughly 8"X10" at 25 YARDS. Yes, a stunt, but with those tiny sights, goes to show you what a decent SA trigger can do.