hmmm...
Sometimes lead will get into the top of the cup that seats the bullet. When that happens, you'll get a different OAL. Also can be any type of powder, fuzz, whoknows what...Clean with alcohol or something similar that evaporates, leaving no residue of any kind.
OAL for 45ACP is 1.240-50...depending on the shape. Most all of the shapes will work inside that range.
As with all reloading, go slow and remain methodical and consistant for best, safest results.
Make sure your handle stroke goes to full-stop each time.
The newer Lee dies have a taper crimp built in. It is extremely important to at least get a good taper crimp to prevent the bullet from shifting deeper into the case. I recommend getting a nice inertial bullet puller to salvage components as you learn. It'll also encourage you to re-load the reload that may be suspect, instead of "test-firing" ...LOL...Do Not Shoot ANYTHING you didn't load yourself.
Stay safe...g2