Just found this in a review
As mentioned previously, since their launch the S400 and S410 have been popular for both hunting and HFT, and rightly so, but personally I always found a little niggle with the operation of the bolt action on the multi-shot S410 version. This was simply because as you drew back the bolt, the magazine would turn one notch putting the next pellet into battery, then pushing the bolt forward would seat the pellet into the barrel’s breech. All well and good… Unfortunately, if you hadn’t pulled the bolt back enough, you would have failed to set the mechanism