IMO as well....
When I'm being really critical about charges, I weigh each and every one with my beam scale (I have an inherent distrust for electronic scales, no matter what brand).
Bulk loading, I weigh every tenth charge. Now, I use a culver type charging station instead of the normal varible capacity like RCBS or Lee or Hornady sells. A Culver charging station throws inherently more accurate charges but costs substantially more and on the plus side, a Culver unit is unaffected by powder shape. Normal displacement type charging stations do fine with spherical powder but not so good with extruded rod powders. Culver measures don't care about powder extruded shape, they throw consistent charges no matter what.
Finally a slight powder variation shouldn't cause serious accuracy issues, Factory rounds vary a bit. Pull some and weigh them sometime and compare.