Peter

Thanks for the comments. Interesting.

I believe the 7 seconds was the standard he uses. He said a longer period could be used if the client wanted or presumably shorter. I believe the longer the period before the second shot, the wider the grouping between the barrels was.

When shooting the rifles, I took a lot longer shooting the second barrel one time, and the impact was considerably wider, which was claimed to be the longer gap time. The gap time had already been discussed previously btw. Myself I thought it was merely my shooting.