Erik,
it may seem like I'm raining on your parade; but, I'm hard core when it comes to gun safety.
Erik Prins said:
i dont usually go to the range to shoot clays so it does not matter if i have 3 shells in the tube when i am shooting. I live on 25 acres so i just invite some friends over and we launch them ourselves, it is nice to be able to go a little longer between reloads (used a mossburg with a 5 round tube for a while)
You may save some time; but, loading for only your next target/s may save a life.
The basic safety rules, common to all gun clubs, are there for a reason. By loading additional/extra shells, there's the chance of a handling incident. Here's a classic example: You're shooting trap, but there's a failure and the round is interrupted while the trap machine's fixed, and it's going to take a while. All the shooters open their actions (the loaded guns eject) and head off the field, all the guns are put in the club rack, and everyone goes for coffee. There are many guns in the rack and several that look similar to yours.
One shooter's done for the day. So, he takes his gun out of the rack, wipes it down, closes the action, slips it into a case, and as he pulls the zipper with one hand, he pulls the trigger with the other (Many shooters don't case a cocked gun). Except, there's a problem, the gun goes off with tragic consequences. It wasn't his gun, he'd picked up yours by mistake, and you'd violated the safety rules by putting a loaded gun in the rack.
On the field you'd loaded an extra shell to save time. When the machine broke, you got distracted and forgot about it when you cleared the first one. That extra shell was still there when you put it in the rack... the rest is history. If you think it couldn't happen then you've never been to a big club on a busy day. This is just one scenario supporting the rule that you never load more than you're going to shoot at the next presentation.