Thread: Pressure signs with factory ammo

I just set up a Sauer 100 and sighted it in yesterday. Cleaned the barrel before shooting and then fired 3 lots of 2 rounds cleaning between each 2 round string using boretech eliminator and leaving it to soak in the barrel for a few minutes before wiping out with 3 clean dry patches.I use a bore guide and do not saturate the patches, they are probably around 75% wet with boretech. After those 2 round strings I cleaned between every 4 shots.
The ammo used was Hornady superformance and Fiocchi, both with 129gn SST's. The Fiocchi is a milder load and is rated at about 100fps slower than the superformance. I have used these loads extensively in my Tikka with no issues. In fact on the same day I fired these same round through the Tikka with no issues.
However in the Sauer I was getting pressure signs with both loads. Shiny spots on the rear of the case and brass shaving on the bolt head. The rifle seemed to behave itself for about the first 4 rounds and the I noticed the bolt was tight to lift and the pressure signs appeared. I was also getting quite significant flyers. After the first 4 shots I was pretty much on target and then shots were going wide of the zero by around 150mm.
The only thing I can think of at the moment is the chamber being a little wet with boretech. However this should have been minimal considering the cleaning procedure. I have added some images of the case head and the bolt head. Looking for some feedback on possible causes.