I just recently purchased a RTI Priest 2 performance in .177 from another member here on the forum. I spent some time with it yesterday and came away with one issue. There's not much adjustment in the FPS from the hammer spring adjuster. Its always shooting hot! I got this rifle to try out some slugs but would still like to tune down to shoot pellets when needed. I even removed the extra spring weight that comes with the performance pkg but still didn't make much difference. To see any drop in FPS at any given reg pressure I have to have the adjuster screw backed out so much that its sticking way out of the butt plate. Its so loose that it can easily be moved by just shouldering the rifle. I figured id bump the reg up to 150bar to help counter the hammer strike. It somewhat worked but just the slightest turn on the hammer screw resulted in a dramatic jump in FPS. Maybe its the .177 model not sure? Has anyone tried a lighter spring and if so do you have dimensions of it??? I will be reaching out to AOA this morning to see what they recommend. I also pulled the spring and will be searching my local hardware store for a similar spring to do some testing!!! If anyone else has had this issue or has some suggestions I'm all ears!!! Thx.