On sunday I finally had the chance to take my new witness out and break her in. I started with about a hundred rounds of LAX new 180 grain. After getting used to the pistol and verifying that there were no unhappy signs on my empty brass I moved on to some underwood 180 grain tmj and gdhp. I ran a box (50) of each without any malfunctions and the brass look ok. Minor expansion visible on the brass but no major bulges or smiles. After the underwood my hand was a little tender so I moved back down to the LAX for another few mags and than called it good with the 10mm for the day. I also had fun with a few other toys while I was out. All told about 600 rounds down range.
Aside from having to walk all over hell and gone to find my brass I actually was able to recover over 90% which I thought was pretty good.
One thing that I did note that I find to be a minor concern is the primer marks on the 10mm brass. I have a nice round dent from the firing pin but the is also a small scrape leading out from the indentation like the pin is dragging laterally on the primer some how. It is very faint on the LAX ammo but very apparent on the underwood ammo.
As this is my first time shooting a 10mm I am wondering if this is normal or should I be concerned?
I have a henning cone fit guide rod and a 20lb wolf recoil spring installed. I am also using the firing pin return spring that came in the bag with the wolf recoil spring if that matters at all.
All my witness guns exhibit that wipe. I think it is from the acceleration of the slide backward overcoming the strength of the firing pin spring.
Thanks for the reply. I am glad to hear that this seems to be normal behavior for a witness.