When we moved into this house in 1980, one of my neighbors was an immigration enforcement officer. He had been a Border Patrolman down in Arizona before that.
I don't know if it was his department's policy or just his supervisor's, but they issued him a 50 round box of Winchester's 110 grain "Treasury" loads and a 50 round box of W-W 148 grain mid-range match ammo every month. They were told to shoot it and bring back the empties.
He was a year or two from retirement and although he enjoyed shooting and hunting, the novelty of those 110 grain bombs in his 2-1/2 inch Model 19 had worn off. I thus got a new part-time job working for him making once-fired brass.
We were a few boxes ahead of schedule, so when he retired, I had a few hundred rounds of each. A couple of years later, my shooting buddy and I went in on a chronograph and a Ransom Rest.
I don't recall the exact figures any longer but the hot .38 was less than 50 fps slower than Winchester's 110 grain .357 Magnum loading fired from the same revolver. We shot 10 or 15 rounds through a 2 inch Model 60 but the rest we shot through various .357's from 2-1/2 to 8-3/8 inches.
It was loud, nasty stuff.