Breech knob shifting?

Hey guys. First post here. I was wondering how come my breech knob would shift back to the center every odd shot or is this normal? Got maybe 120 shots through it. I got the Condor 24″ .25 almost 2 weeks ago.

Things I’ve done so far- removed auto-safety to be able to decock the gun.
– tossed a recommended o ring on the TH #010, that helped tremendously, gave me a more flat curve instead of just a slope down with every shot..
-PW at 1/1.25ish

I’m shooting Cuda’s 31.02 gr at High-1025, Low- 988 with a fill pressure of 2850 PSI via the gun’s gauge.

And will be looking to tune it down a bit more to try Kings sub 1000 fps.

Love the gun and plan on a Mad Dog Ambi.

Any help or info much appreciated, thanks!
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