Searched here but have not found the info, so I'll ask the pros. What have you found to be the difference of grains (RL-15) for the same point of impact for 416 REM using 400 gr Part. vs the Nolser 400 gr solid. Would 1 grain difference be about right??? Thanks for all the info!

there is no magic formula. every gun will shoot them differently. all you can do it trial and error shooting

Butch is correct. No part of reloading has been or can be reduced to a chart or formula, ie, POI for RL-15 in a .416 with Nosler 400 Partition vs. Nosler 400 Solid has not been tested by anyone because it would only be valid for that rifle and no others anyway.

You want to know how something will work in your rig? Try it!