Plenty of good points here with reference to OAL. We need to remember that OAL is just a "guide" number, that is used as a reference. It is a somewhat "made up" number that falls with in a magazine's internal dimension. For a given published bullet, OAL is referenced for a number of reasons: magazine dimension, SAAMI spec, published pressures, feeding, crimping and probably some corporate attorney had to sign off on it? I see pistols regularly on the range that have issues with failure to chamber and for years it was almost always attributed to the infamous "Glock Bulge". After close inspection, the great percentage of the FTC are cause by OAL issues and have nothing to do with the case sized dimensions. Taurus G2's are famous for this.
The issue is almost always the leade or the throat of your barrel and its relationship with the ogive of your bullet. Now I don't want to start a whole new thread on whether the bullet should jump into the rifling or the bullet should be kissing the rifling. That is a issue that barrel maufacturers and customers need to decide for themselves. I just want to make aware that your ammunition can possibly pass the plunk test and the OAL test, but not pass the throat/leade and bullet ogive test. Since there is not a standard bullet ogive location there is no way to guarentee that a given bullet, at a given OAL will chamber in your gun.
A good test that we have used for years is: drop the loaded round in your chamber (the plunk test?) and then apply a bit of thumb pressure to the base of the case, then see if you can turn (spin) the case in the chamber. If the case is sized and crimped correctly it should turn since the round headspaces on the mouth. If it doesn't spin most likely the bullet is hung-up in the throat or the leade and your OAL is too long for that chamber.