When I was testing seating depth, I also ran into a sweet spot of .080"-.110" on my 6.5 Gap. This was done ladder style at 600yds.Using that .336” bushing, you should run a seating ladder with the 245s somewhere between .080” to .120” jump.
I know that sounds odd for what we normally test with Berger bullets, but I’ve had really good luck in a couple cartridges (7mm and 338) jumping them a long ways out to .120”. And now I’ve been reading where some people are finding that the longer seating jump range is much more forgiving in ladder testing than the shorter .040” to .000” (touch) range.