Just bought a new shotgun. Before I put the barrel on I went ahead and removed the dowel from the magazine. Manual states that this is a 4+1 mag. I can fit five in the mag now, making it a 5+1. Any insights on this? Also, it came with a full, modified and imp choke option. Tried looking these up online to find the best choke to use for shooting clays. It seems that there is a wide variety of opinions on this. What are your thought?