There is no issue at all.
Every 9x19 I have will take up to 0.358" lead bullets in EVERY case without issue.
Next, you aren't shooting long-distance rifle where very small variables "might" actually have some effect.
In fact, most shoot at such short distances that nothing much matters except the shooter's ability to aim.
Finally, taper crimp is KNOWN to NOT be sensitive to case length, over the range you are likely to see. Even roll crimps just aren't as sensitive as so many think.
As long as every case has the case mouth flare removed so the round can feed and chamber, you have ALL the "crimp" you need.
First shoot per instructions and then see if there is a problem.
There is one area where 9x19 appears to be unique: some cases with very thin case walls.
Be sure to always do a push test after seating a bullet by applying thumb or finger pressure to bullet meplat as you try to push the bullet into the case. If the bullet moves at all, reject the round.
this could be true of every cartridge, so you should test them, but only 9x19 has it happen with regularity (say, 1 in 500 rounds of pick-up range brass).
Step back and think for a minute:
We have been loading 9x19 for over a century, using mixed cases and jacketed bullets from 0.355-0.357" and lead bullets from 0.355-0.359" without any issue, and you are suddenly afraid that you've discovered something every one missed?
I guess it is true: every generation thinks it's invented sex and reloading.
Re: COL and Plunk Test
Your COL (Cartridge Overall Length) is determined by your barrel (chamber and throat dimensions) and your gun (feed ramp) and your magazine (COL that fits magazine and when the magazine lips release the round for feeding) and the PARTICULAR bullet you are using. What worked in a pressure barrel or the lab's gun or in my gun has very little to do with what will work best in your gun.
Take the barrel out of the gun. Create two inert dummy rounds (no powder or primer) at max COL and remove enough case mouth flare for rounds to chamber (you can achieve this by using a sized case—expand-and-flare it, and remove the flare just until the case "plunks" in the barrel).
Drop the inert rounds in and decrease the COL until they chamber completely. This will be your "max" effective COL. I prefer to have the case head flush with the barrel hood (or a few mils higher than where the head of an empty case aligns with the barrel, as all cases are too short and I prefer to minimize head space). After this, place the inert rounds in the magazine and be sure they fit the magazine and feed and chamber.
You can also do this for any chambering problems you have. Remove the barrel and drop rounds in until you find one that won't chamber. Take that round and "paint" the bullet and case black with Magic Marker or other marker. Drop this round in the barrel and rotate it back-and-forth.
Remove and inspect the round:
1) Scratches on bullet--COL is too long
2) Scratches on edge of the case mouth--insufficient crimp
3) Scratches just below the case mouth--too much crimp, you're crushing the case
4) Scratches on case at base of bullet--bullet seated crooked due to insufficient case expansion (not case mouth flare) or improper seating stem fit
5) Scratches on case just above extractor groove--case bulge not removed during sizing. May need a bulge buster.
