I have a T3X lite stainless and also a T3X Wideland both in the Creed. Both of them will not chanber the Federal 135grn Bergers, and both have a hard time chambering Nosler ballistic tip factory ammo as well.
The lite shoots extremely well with the ELD-X factory ammo and pretty decent with the Berger factory 135gr. I haven’t played with the Wideland as much yet but so far it will keep the Berger 135gr factory ammo to around 1/2”-3/4” at 100 and 1.25” at 200 yards. The Wideland really likes the Hornady American Gunner ammo which is good because I bought around 600 rounds of it pretty cheap pre Covid. It makes good practice ammo and I am saving all the brass to try out some Hammer Hunters shortly.