Mark, before you spend money changing the gun, change your load, you can always change back.
Open guns need gas to shoot flat, more powder, more gas, lighter bullet, more powder, slower powder, more gas.
You're loading 7gr of WAC under a 125, but you could be loading 10+ gr of AA7 or Shooters World Major under a 115.
HS6 under a 125 is a move in the right direction, but there are miles to go