KN - you have a very serious problem!! You need to sell all 3-4 and start over. Alternatively, you can set the 3-4 aside and buy more candidates.

I'm looking at the statistical side of this question. It really is a good question, too. Clay target scores are one indicator, but may not be definitive. For example, I just finished 1000 trap targets with the NID 4E trap gun. I broke 927. There were 7 scores of 25 and one score of 19. The average per round is 23.175 and one standard deviation is 1.43. The average per 100 is 92.7 with a 1SD of 3.47. Any 100 bird score below 89 is cause for rejection of that gun or above 96 will be cause for further investigation. That gives me a strong base line for comparing my performance with other guns. Skeet, 5-stand, sporting clays, or field notes can also get the same treatment. The advantage of objective data is to keep bias for or against a gun out until you really understand how well you shoot it.