Jeff....I can't think anything other than the patterning procedure was in reverse. Set the wanted POI of the top barrel by comb and know that the bottom barrel shoots higher. Settings that I and many others would like for doubles, but again.... not for everyone. The OP can change hangers to drop the POI of the bottom barrel to preference. Its the only barrel that can be changed after POI is set to the fixed top barrel. The top barrel is either fixed rib on a conventional K-80 or carries an adjustable rib on the Special. In both cases its the top barrel that needs to be set by gun adjustments (comb and or adjustable rib) and the bottom barrel can be set to relate to the top barrel as in preferences.
All true statements Maltz, but here are the reasons I asked the Original Poster (Vt_archer) my questions:
1. Vt_archer said the top barrel is shooting 8 to 12 inches low.
As I asked him, is he saying the top barrel is shooting significantly lower than a 50/50 POI? That's what it sounds like. Is there any possible way to make a K-80 (or any other gun) shoot to such an absurdly low POI, other than a) something is seriously wrong with the gun or that specific choke tube, or b) something is seriously flawed with his technique at the pattern board?
2. He indicated that he shot a full round of trap (presumably 25 targets at 16 yards) and never hit a single target. Even if the top barrel's POI is a little low, you'd think he would have stumbled into chipping at least a couple of them. All of which leads me to believe that the sequence in which Vt_archer is setting his POI is not the major problem he is facing. We need more details from Vt_archer to figure out what's going on. Major gun defect? Flinched at the pattern board, and it's playing mind games with him? Is he an inexperienced shooter (especially at Trap, since his K-80 is a sporter model)? Something else?