My wife and I both hunt in the shotgun area of Wisconsin with our 20 ga. Rifled Barrel Trackers that wear low power variable scopes. Her Tracker shoots really well with Federal Hydra-Shok HP Magnum Sabot Slug, while the Win. Partition Gold is the best I have found in my Tracker.
She is set with hers as the recoil from the higher velocity loads from the Rem and Win above mentioned offerings is more than she would want to endure.
I have had great success with the Win Partition Gold, but have recently tried some Rem Core-lokt Ultras. (but haven't hunted with them yet)The Rem offering shoots higher on the target than the Win, which I have sighted in 2" high @100yds. The killing power of the Win is also good as it dispatches a whitetail handily.
What if any are your experiences with the Remington Core-Lokt Ultra? I think that with the higher impact on the target, the Rems may possibly carry a greater distance than the Winchester Partition Golds. Any thoughts?