So after many years of shooting, the old body is getting a bit stiff (and not where I want it?) I've always been a very average shot, a good day is a bird to cartridge ratio of 50 percent. Recently I've realised I'm aiming under the bird, feeling less inclined to get my head down onto the comb. My moderated 20 gauge was the worst of my guns, it shoots low anyway, then with me mainly looking at the bird above the barrel, misses were becoming very frustrating. I've now raised the comb quite considerably as well as fixing a make shift short rib. It now shoots high with a ratio of about 60/40. I've just read in this months Sporting Gun, that high rib guns are becoming more popular for the field and not just for trap. The gun I shoot best with is my Affinity, which has a fairly high rib. I've sort of answered my own question here, but was wondering if any more mature and/or less supple shooters have switched to high rin guns and what the difference has been? 

High rib needs a high stock and a lower rib needs a lower stock for the same POI.  They are a gimmick but if you want one go for it, no harm done. 

5 hours ago, Weihrauch17 said:

High rib needs a high stock and a lower rib needs a lower stock for the same POI.  They are a gimmick but if you want one go for it, no harm done. 

Very handy if you have a long neck.

My eldest Son, 6' 7" tall makes great use of a Beretta 682 X with its raised rib and "Monte Carlo" stock.

Yep, Summit Impact adjustable rib set at 60/40 which I find very comfortable. 

I think the OP means a rib that is higher at the rear and low it the front like the Afinity is, also using the higher combe you will see "more" rib which again will produce a higher shooting gun.