Needs to be broken in, that is my experience with mine...I've only got about 50 rounds through it and it is getting a lot softer but needs to be broken in more.
Revised....Went out and shot about 50 more slugs...This thing just kept slapping me on the cheek...It is not getting softer...It is brutal...takes the recoil up into your face instead of back into the shoulder...I took it off and put my Mossberg stock stock back on and what a relief...Wasted almost two hundred bucks on this sucker...Check out the youtubes on this thing...I'm going to try and sell mine or give it away...POS imo.