Not exactly.
After the Miami shootout on 4/11/86 a couple things happened. .45 ACP pistols were immediately authorized, first with 185 grain Silvertips and later 230 grain Hydra Shoks. 9mms remained in service, but the move to 147 grain ammo began.
A vocal group in the Bu firearms community advocated .45s for all. Another opted for a newer round - the 10mm.
Full power 10mm ammo was never issued to agents. There was no issue with excessive recoil or female agents or wimpy little accountants.
The fledgling ballistics research unit started with the 10mm and the 180 grain bullet. They shot it into ballistic gel at increasing velocities until it did exactly what they wanted, which was at about 950 fps. Then they put out a bid request for a few million of them.
At the time, the Model 13 .357 loaded with .38 +P (and the option for .357 Silvertips) was the predominant handgun in the Bureau. The thinking was to have the same setup with the 10mm - normal carry would be the 180/950 load, with the option for the big stuff if needed. We also bought a boatload of HK MP5/10mm subguns.
The 1076 was actually a popular gun, and many guys hung on to theirs until they were forced to return them.
Of course, someone soon figured out you didn’t need that big 10mm case to do the 180/950 thing and the .40 S&W was born. The Bu then bought in with everybody else.