I see it appears all trial and error but I am also trying to see if there is any basic logic to choosing components. (Mainly because i am not very rich)
With this .222 I first looked at nosler 50 b/tip but at magazine length the jump was even worse, there was no .224 outside the neck. Looking at earlier design projectiles like the speer hp the ogive is longer in length so it should be starting closer to the lands. So are there bullet designs better suited to long throats?
My current belief in making a load is to try to get a bullet as close to the lands as possible, use the powder than gives a compressed load and try to be as consistent with the assembly.