New batch of bullets - need recommendations

[dpete]

Not for a 308 but I know some of you guys shoot Grendels too.

I recently received a new batch of Nosler custom comps from Shooters Pro Shop for my grendel and they are shorter base to ogive than the previous ones I have loaded.  The ones I have loaded average .698 CBTO and the new ones average .689 CBTO.  Where would you start in finding a new load for the new batch of bullets?

Start from scratch, and work up an entirely new load?

Use the same powder charge as the previous batch and seat to the same depth to start, then play with seating depth from there?

Use the same powder charge and seating depth as a baseline then vary charge by .1 grain up and down from there?

The current powder charge the rifle likes is by no means hot, so I have room to experiment with charge if I have to.

[98Z5V]

3 hours ago, dpete said:

Use the same powder charge and seating depth as a baseline then vary charge by .1 grain up and down from there?

 

This is how I would tackle that one.