After a few matches and some range time I have found that there is merit to every answer...
Practicing minor and competing major increases muzzle flip (obvious point) in turn, slower splits.
Practicing minor is still practice, in turn aiding match performance.
Conclusion, if I have MANY minor rounds. I'll practice minor as much as I can. Then switch to major for the last session before the match to get back in the major groove.
Thanks,
Ben Sons