I understand the 16-17 yd. testing.
A good friend and excellent youth shotgun coach finally convinced me to try it.
The OP is shooting for impact, not pattern. You get a tight pattern that better shows this point of impact at the closer distance.
I too am somewhat confused by the terminology used. I generally put my sight picture - stacked beads - on a 1/4" dot black dot at that distance.
Like oneounce suggested, you should first eliminate shooter error and shoot enough different shots on different targets to really confirm your hold and impact.
It is important that you use your same natural gun mount and sight picture rather than try to compensate for where the gun is hitting.
Again using the coaches advice, I use a heavy duty camera tripod and sandbags that are elevated to allow a normal standing posture to support my hand on the forearm.
This helps to 'tighten' the groups and more quickly identify the adjustments needed.
Brownells sells choke reamers that would allow you to open the chokes. Cheaper than installing tubes, but obviously not reversible.
But that can wait until after you are satisfied with your gun fit and ready for the pattern board.
I'll be talking to him this week and will ask about stock adjustment guidelines for fixed stock guns.
JT
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