I bought me an SB1 F10 and decided it needed more than A bead sight, so I JB welded the sights off my encore 270 on the barrel and so far so good. I shot 10 3.5 inch turkey loads and 10 3 inch turkey loads and it hasn't budged, my shoulder on the other hand is jello, that thing kicks like a mule. I did have one question, I'm averaging about 12 pellets in the head and neck area at 45 yds with the choke it comes with. Is that a good number or should I try some different loads? That was with both remongton 3" and 3.5" loads. Any suggestions in loads or different tubes would be appreciated.