Compressing a load until it causes the bullet to creep is over-compressed IMO. If you are loading within the book limits and are concerned with bullet creep, you can always crimp the bullets in place.
Mildly compressed loads using stick powder are seldom a problem; compressing a load using ball powder is to be avoided. With the pletora of powders we have available now, one can usually find another powder that does as well w/o compressing.
