Quoted:
It depends on what your chamber will take...or the gun. I do as you did....work up the loads to get the best groups possible. Then adjust oal to gain the tightest groups. no closer than 10 thou. off the lands.

or  go as long as your magazine will allow.

Note:  Remingtons are known to have excessive throat...so you may never come close to reaching the lands without some barrel work.

When choosing a load to test, keep in mind that seating depths can make a HUGE difference in pressure. Remember that seating bullets into the lands can raise pressures but moving 0.020" or more AWAY from the lands can also raise pressures, because you are reducing the effective case capacity. Many readers ask us "should I jam or jump my bullets." There is no right answer for every gun. For every guy getting great results at .015" jam, there is another guy doing well with a 0.025" jump. In general, most popular .308 match bullets (Bergers excepted) are tolerant of jump. This is certainly true of the 168 and 175 SMKs. So don't worry that you may be sacrificing a great deal of accuracy by loading to mag length, even if that puts you pretty far from the lands.