I spent some time walk back tuning the Captain yesterday. Mostly working with the left-right adjustment. In the end, I made a very small (1/16") adjustment towards the riser and the arrows are falling in a nice vertical column. Groups tightened a little bit too.

Here's the weird part: velocity went up 4 fps. I shot a lot of arrows through the chrono to make sure it wasn't a fluke. Do you think that tuning can increase velocity this much? Or, do you think it is just a chrono variance?