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Discussion Starter #1
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Which is the more important adjustment with regards to setting up 50/50, 60/40, 70/30, etc ?

The adjustments to the stock comb ?

Or the adjustments to the rib ?

If a sporting clays gun has an adjustable comb but not an adjustable rib, can the comb be adjusted enough to make it suitable for trap shooting ?

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It depends on the gun. Kreighoff's actually warp the barrel to chang POI. This is the only gun that I know that you can "effectively" chage the POI with just the rib. You can still change POI with the comb as on all guns.

It depends if you are stuck on the whole bead stacking thing. If you are one that has to see the "fig 8" thingy, then you need a way to facilitate a rib height change.

Major POI changes are done with the comb, and the adjustable rib is there to fine tune.

ss
 

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The comb determines your POI, the rib is for visual (so that little thing between our ears think it looks right).
 

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The most important POI adjustment is made (or should be made) using the comb, so an adjustable comb is the place to start. Contrary to some assertions, adjusting the height of the front of the rib (that is, the bead height) will also alter the POI, although usually in much smaller increments. Think of the comb as the rear sight of a rifle. Changing the rear sight height (in a shotgun, the rear sight is your eye) will alter the point of impact up or down. But the front bead is, in the same way, analagous to the front sight of a rifle, and can also change point of impact up or down as it is moved up or down, just not as much. Except for those ribs pivoted in the middle (most pivot at the rear), rib changes are not meant to retain or gain some mythical "figure eight" bead picture. In fact, except for the initial alignment of beads to ensure you are not leaning the gun left or right, the middle bead should be ignored as it really has little or nothing to do with the sight angle between the rear sight (your eye) and the front sight (bead), which is what determines your POI.

Jim R
 

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Hammer1, neither is more important. Lowering the front bead 1/16" by way of the adjustable rib and leaving the comb unchanged has EXACTLY the same effect on POI as leaving the bead unchanged and raising the comb 1/16".

There are some other considerations. If you shoot buried beads and you lower your bead, you will have to raise the comb so you can see the bead. That will double your POI adjustment.

If you can only have one adjustment, an adjustable comb gives you the most flexibility. I have both, and like the additional flexibility they provide.

If your sporting gun does not have enough vertical adjustment left, you can always install longer posts.
 
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