And then there is this problem...

If you set a heavy crimp [and you're not using a Lee Factory Crimp Die which resizes the cases after crimping] based on a randomly selected case that happens to be short, when you crimp longer cases you'll get a bulge that may cause chambering problems.

I know it's not a popular practice on this board but it's the reason why I trim or at least sort my cases by length.

I find typical .38 special cases to vary quite radically in length.

.030 or more is not uncommon. That makes a huge difference in crimp and can collapse and bulge a case.