Ok, here's the question...
And I've heard a few answers or suspected reasons, but to better understand my reloading technique and my own consistency in handle pull, crimp, etc I'd like to hear what some of you have to say and any experience you may have had.
So, while reloading some 9mm RN 124g Rainier Ballistics these past few weeks I've had alot of inconsistencies in OAL. My load data said my OAL should be 1.16. What I found was I was getting anywhere between 1.16 and 1.17 they all shot ok, but I really want to understand what is happening.
For reference I'm using a Dillon 550C, 5.4g of Ramshot Sil and according to the Ramshot load data my OAL for these rounds should be 1.16, powder range 5.2 - 5.8
I decided to take a look at bullet consistency with 5 random bullets out of the box and using my calipers I got the attached measurements.
I compared the 124 Rainiers to some 115 Xtreme. As you can see with the Rainiers I saw a +/-.005. Looking at the Xtreme I saw +/-.0025
Are inconsistencies in projectiles common? My loaded rounds all passed the plunk test. I'm more concerned with why I'm getting such a delta with the finished rounds.
Thanks