While I am too tired to do the exact conversions, it looks to me like the Remmington Core Lokts have virtually identical trajectory to the 30-30's out to that 150yd range....Possibly even flatter. (The Rem data has a 150yd zero, while the 30-30 data I am looking at is for a 100yd sight in, as I mentioned I have no interest in doing the full conversions, I think even a simple review of the charts will prove my point.)
Using the trajectory charts on the remington site that you provided a link for
slug +2.4" at 100yards for a 150 yard zero
30-30-150gr load +1.6" for a 150yard zero
Therefore the slug drops more from 100 yards to 150 yards.