Man, that brings back some great memories. Super rifle.
I don't think you'd go wrong with either the 150 gr Ballistic Tip or the 140 gr Accubond.
I had some great accuracy results with 7mmRemMag & 150 gr Ballistic Tips back in my reloading days. Very each work up, too. Killed a couple deer at 75yds and 125yds with no complaints.
If I had that Sendero I'd give the Accubonds a try first. Same accuracy with a bit more stoutness if you take one at shorter ranges/higher impact velocity.
I have hand loaded 7 mags for a long time , the Sendero with Imr 4831 and 140 accubonds are the flattest shooting set up for me.
A Timney trigger and a high $ scope will be an awesome set up!