My gunsmith suggested that my 6-284 would most likely shoot best with the Sierra 107 matchking bullet seated 0.010� to 0.015� into the lands. I plan to go out and try several different seating depths and wonder what increment to use? Should I try just touching the lands, 0.005�, 0.010� and 0.015� into the lands or should I try in 0.001� or 0.002� increments or what? Thanks, Rufous.

rufous:

Increments of .005 have always worked for me. Into the lands is probably best with most 6mm rifles but once the cases are formed don't be afraid to come back out of the lands if you need to. All rifles are different.

knobmtn

ditto what knobmtn said...

I prefer staying away from the lands. Touching them will create more chamber pressure and aid in early throat erossion. You will be able to work up a load that will give you great accuracy and keep you off the lands. Just be patient and try many.

Iwould start about 0.035" AWAY from the lands and seat test
rounds of 3 each increased by 0.010" closer until I was just
0.005" off the lands and watch for pressure signs and group
tightening at any of the intervals. You may find the best
barrel harmonics (sweet spot) needs a running start to avoid
undue pressure buildups. Good luck...BLR7