Has anyone tried the rem. core lokt Ultra bullets?

No.

Guns cause crime, like flies cause garbage.

Thought about it this year for elk but used the TBBC. Will probably shoot them this summer to see shoot as well as the regular core locks in my rifle. Maybe try to shoot them through some wet phone books too.

I've had Remington Core-Lokt bullets in 7MM mauser 140 grain separate at 2400 ft/sec!!! To use such technology in something like the Ultra mags seems a little like an oxymoron to me!!