The only thing I'd like to see is what that would look like if you drove the 250gr bullet faster. Your 300gr/120gr powder example almost perfectly matches what I get out of my gun, but a 250gr bullet with that powder charge would run closer to 2100 fps I think though I haven't chrono'd a 250 lately.

In my gun, 200gr bullet 110gr powder = 2100 fps and 300gr bullet 110gr powder = 1800+ fps. So I think you're stacking the deck a little

I've had great luck with 200gr but the 300gr sure makes a SMACK when it knocks them over!

edited to add - within the range you mention (<170 yds) it'll still be a relatively small drop in distance. But depending on the bullets being compared it can be huge further out, notice the drop off the cliff evident toward the bottom of your charts.