I loaded up my first batch of or group by MP 200 grain HP boolots today. I checked my OAL. I seared a boolit in a case abs chambered it about a half dozen times and the shortest measurement was 2.462”. I figured I’d load at 2.420” so my case mouth would line up with the crimp groove. I ended spinning the die in a hair further by accident and ended up seating it a little deeper at 2.415”. I used my lee factory crimp collet die and used a little lighter crimp than I normally do. I cycled a round through it a5 2.415” and it chambered and ejected perfectly. Just like the lees I loaded about .04” shorter than my chamber measurement I but I still noticed microgroove rifling marks on my boolit that chambered and cycled fine. Just want to make sure this isn’t to excessive and I don’t get pressure spikes.
Hers a pic. Is this ok?
Here’s my OAL checker and where the boolit stopped to measure the max chamber length so you can see I’m a bit further back from where my boolit stopped but I still have microgroove markings.