I have the browning stalker in 270wsm(no Boss) Win 70 classic (no boss) browning stalker 300wsm (with Boss) and have sims recoil pad on the 300 and browning 270 wsm.Can shoot both 270wsm all day with no problem with recoil,and the 300 all day with the boss.One day I took the boss off to see how it shot without it and 3 shots was all I wanted without the boss and that was with just a 150 gr bullet.Don't believe I want to try a 180 or 200 gr without the boss.