Re: FBI 308
I know you inquired about the FBI, but many of the local SWAT type units in the Northwest are going away from the Federal GMM and switching to some of the tactical loads like TAP, Tac Bond and so on.
The Federal GMM is sort of the gold standard for accuracy testing, but isn't so great for predictable penetration (overpenetration?) and behavior through various common items a marksman might have to shoot through...glass, thin door, clothing, and so on.