C,
Now you have a couple of spent cases this should be an easy fix.
Those spent cases are arguably more useful than your Lyman gauge. Rather than use the Lyman to benchmark your reloads against SAAMI, consider using spent cases to benchmark reloads to the chamber they will be fired out of. Spent cases are fire-formed to the shape of the chamber, so you now know the key dimensions of what your reloads should be.
Measure the length of those spent cases from the base to roughly middle of the shoulder or 'datum line'. This measurement is often called 'headspace'. The Hornady Comparator gauge set does a great job of this, but if you don't have one a 9m or .357 handgun case will do. It's a bit fiddly but works. Screw the full-length sizing die in until cases start to get bumped. Lock the die ring when the bump is about .003"-.004" shorter than the spent case. This is the ideal compromise in a semi-auto to guarantee cycling, but without working the cases too much. Whether the newly bumped .003" cases fit the Lyman gauge is now almost irrelevant. Sure, it will give you an idea of how your reloads and chamber are relative to SAAMI, but ultimately you should load for the chamber, not SAAMI.
As you don't have the Comparator gauge here's doing the same thing with a 9mm case. I recommend getting the Comparator gauge at some stage.
[ATTACH=CONFIG]19562[/ATTACH][ATTACH=CONFIG]19563[/ATTACH]
Now you have a couple of spent cases this should be an easy fix.
Those spent cases are arguably more useful than your Lyman gauge. Rather than use the Lyman to benchmark your reloads against SAAMI, consider using spent cases to benchmark reloads to the chamber they will be fired out of. Spent cases are fire-formed to the shape of the chamber, so you now know the key dimensions of what your reloads should be.
Measure the length of those spent cases from the base to roughly middle of the shoulder or 'datum line'. This measurement is often called 'headspace'. The Hornady Comparator gauge set does a great job of this, but if you don't have one a 9m or .357 handgun case will do. It's a bit fiddly but works. Screw the full-length sizing die in until cases start to get bumped. Lock the die ring when the bump is about .003"-.004" shorter than the spent case. This is the ideal compromise in a semi-auto to guarantee cycling, but without working the cases too much. Whether the newly bumped .003" cases fit the Lyman gauge is now almost irrelevant. Sure, it will give you an idea of how your reloads and chamber are relative to SAAMI, but ultimately you should load for the chamber, not SAAMI.
As you don't have the Comparator gauge here's doing the same thing with a 9mm case. I recommend getting the Comparator gauge at some stage.
[ATTACH=CONFIG]19562[/ATTACH][ATTACH=CONFIG]19563[/ATTACH]