Browning BPCR Low Wall

[Steve Anderson]

I bought a .22 low wall of the Browning persuasion. It seems to exhibit some vertical issues. As in it shoots pretty well horizontally but the group is taller than it is wide. This with Lapua Center X. I'm guilty of not testing with anything else. However I have blind faith in the Center X. For lack of anything obvious with the rifle, I wonder about low hammer power and inconsistent ignition. Can a mortal replace the hammer spring? Indeed it "feels" light and certainly the trigger is light. In fact the hammer most often needs to be manually cocked. Any thoughts?