Except for in pistols crimped loads were less accurate for me. Roll crimping can increase run out especially if the case length is not completely uniform. I find the same benefits Lee is claiming by adjusting case neck tension. In a factory chamber I think the run out is less critical unless way out of spec. One test found that even the military O3A3 chambers would straighten out cases with .06 run out to a certain extent.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli