I have an HK UMP that I run exclusively for high-risk vehicle contacts on patrol/SWAT. All other work goes to my 5.56 SBR, so this question is only in regards to working on cars with that gun.

My ammo choices are either the Hornady Critical Duty 220gr +P or the Federal Tactical Bonded 230gr +P.

From what I can find online, the C.D. is on the good doctors approved list, but isn't very highly regarded. The Federal bonded isn't on the list, but I don't know if that is just because it hasn't been tested. I can't find any good test data on the Federal. I'm leaning toward the Federal just because it is bonded and it's a slightly heavier bullet, so reason tells me it should do better through auto-glass, but the lack of any solid data has me second guessing that choice.

Can anyone offer any feedback or real-world test data to compare either of these two rounds for my intended purpose? Also, who would ditch the UMP and run a Sig SBR with Hornady 55gr GMX barrier for vehicle work?

Thanks for the help,
Burke