The time a projectile spends in a bore is also the time that allows the shooter to move the firearm off of target.
Tom, a cantankerous old coot if there ever was one, claims that this is important.
I disagree for the following reason; the bore time for any firearm can be compensated for with proper marksmanship fundamentals. As long as the you practice BRASS (breath out, relax your muscles, aim, verify your sight picture, and squeeze the trigger) bore time will factor into your zero and have little to no practical effect on accuracy.
Whizzbang speedy cartridges like the 22-250 or 22 Swift are not used in benchrest competition by serious competitors. Benchrest cartridges are designed for consistency, and while some of them are capable of impressive velocity, many are not. Of course with benchrest, you have a mechanical rest that helps keep the rifle aligned with the target.