I'm pretty new to this also...
My twist rate is faster than yours @ 1 in 11.25, so ymmv. But I've had really good groups using 175 SMK's and 43gr Varget, shooting from .15 MOA up to just under .5 MOA.
I just got back in from testing some 178 A-Max's and 175 VLD's with 43 gr of Varget, and neither was that great, shooting from about 3/4 MOA up to 1.5 MOA.
I just read another thread that stated that the VLD's need to be seated into the lands, which I am unable to do if I want them in the magazine. I will try some seated 0.002 - 0.005 into the lands, but the COAL will force me to do single shot loading... VLD's are really long bullets that have what looks to be a slightly shorter bearing surface, so you have to seat them even farther out than your typical bullet in order to get them into the lands.
More later after load development