Folks shooting 30 caliber magnums in competition with max safe (normal) loads with bullets seated out to touch the lands have been getting excellent accuracy since the 1950's. I've no idea what the internal ballistics are with bullets so seated, but pressure's fine and accuracy has equaled what the long range benchresters get these days.
Ejector hole marks in case heads typically indicate pressure's too high. Cartridge brass starts to extrude into holes in the bolt face at about 65,000 to 70,000 CUP (80,000 to 89,000 PSI). Bore obstructions, tight bore and groove diameters for the bullet or the wrong powder type or charge weight are common causes. Regardless of the cause, it you see ejector hole marks on the case head, something's causing it. We all get to choose our own safety margins to shoot in.
It's best to remove anything you put in the bore after cleaning it before you shoot it.
There was an article in the American Rifleman many years ago on the pressure difference between bullet seating about 1/10th inch off the lands compared to touching them. It was only about 2,000 to 3,000 CUP difference in the .30-06 cartridge they used. Here's an example:
Note the two far right bars indicate the bullet was seated .001" and .021" long and was set back that far when chambered. And no pressure difference between bullets seated .019" off the lands and .001" long to push back that far.
Shame on those who put two different pressure measuring systems' charts together. The top one with bars is acutally CUP numbers and the bottom one with the curve is PSI. But they do show pretty well that pressure goes up a bit when a given load's bullet touches the lands when its fired.