DAA is right. OAL does not mean much. There is just too much variation in the bullet tips. The hollow points seem to be the worst, but all types vary the tips enough so that referencing to the tip is inaccurate. The only thing measuring OAL is good for is magazine fit.
Idea!
The next time you have a rifle chambered, if you have some extra barrel length, have a comparator cut with the chamber reamer.
Jack
