Skeeter is correct. The cam pushes the bolt arm up which lowers the bolt head. The bolt head needs only to go as deep as the frame w.t.. Most go much further into the frame which causes undue stress on the spring. The adjustment for this is the rear most vert. surface of the bolt arm ( the left one). Be careful though, the intersection of the top of that surface and the horizontal (top) surface is the point that bolt drop occurs. That said, set "bolt drop" first and then adjust the depth the bolt descends into the frame as needed (don't touch the drop off point!).
Mike
Of course, going to coils is another "fix" because coils don't care so no need to adjust the depth. Lol!!