.45 Colt doesn't have a +P SAAMI spec (only .38 Special, 9mm, and .45 ACP do)
That being said, some manufacturers will make an over pressure .45 Colt load and call it +P --- using it in the Judge (a medium Tracker frame) would not be advised.
From the Buffalo Bore website:
"The OAL for this cartridge is 1.572 inch. Which means you can chamber it in revolvers that are too weak to fire +P loads. So, use this ammo ONLY in ALL LARGE FRAME RUGERS, (i.e. Black Hawks, all Red Hawk iterations chambered in 454 Casull and 45 Colt, and pre 2006 Vaqueros) Colt Anaconda, all FA revolvers chambered in 454 Casull and 45 Colt and Dan Wesson revolvers, Winchester and Marlin mod. 1894, all falling block actions made of modern steel, TC Encore and the Handi Rifle."