Yes, SAAMI lists an OAL spec for cartridges. Check 'em out at their web site below:
Some cartridges' OAL is spec'd maximum and others minimum. Look up yours and check it out
Oft times, competition folks will seat bullets a few thousandths longer than leade contact so when the round's chambered, the bullet seats back a bit creating the same start resistance for each shot. This works best with light neck tension on the bullet and for single round loading anyway.
At the other end of the spectrum, US military 7.62mm NATO M1 and M14 rifles reworked properly for competition would shoot good lots of commercial match ammo inside 4 inches at 600 yards. Not too shabby in those huge military spec chambers, brand new cases and bullets jumping near 1/10th inch to the leade.
As long as there's no more than a couple thousandths bullet runout, jumping a ways to the rifling's no big issue.