Might sound unconventional but my pet load is 23grains of N130 with a 40gr Blitzking, been shooting better groups with this combo lately than with my ppc.
btw: my rifle is also a 40x
I've won a lot of UBR matches with 24.5 grs of I4895 & 21.0gr of Rel 7. Both with a coated 53gr FB Hillbilly Bullet. Primer doesn't seem to matter as I've used several different ones. The 4895 load has to be dropped slowly and will be compressed. The Rel 7 works just as well and is easier to load.
19.5 IMR 4198 and 53 gr or 53 gr sierra MK. Fed match primer, lapua brass. Settle in for a long winter nap...it is consistently boringly accurate and fun...