It's actually an important consideration in accuracy. We don't generally talk about RPMs directly but we do talk about the two things that dictate RPM, twist rate and velocity. We talk about it when we say a bullet is "stabilized" even though we don't use the term. Some extreme accuracy folks do calculate the numbers directly.
Too much RPM can be just as bad as too little. Bullets with inherent defects are thrown off course by imbalances.
And, yes, the first time I did those calculations I thought I screwed up the numbers. 200,000 RPM?! That can't be right... Well, yes it can.
