Determining original choke constriction

[Jeff S.]

Dean, thanks for the response. Based on the number of times I've seen posts from you, I know that you are quite knowledgeable when it comes to shotguns. So, with your help, let me drill down a little deeper. You suggested that Parker used 7 1/2 shot for their tests. I'll buy that. You also mentioned 1 oz loads. I "think" (never counted) that there are 350 #7 1/2 BB's in a 1 oz. load. Using 350 BB's as the denominator, from the factory, the gun would pattern 34% on the right and 48% on the left. Those are pretty wide patterns. Since this is a 16 ga. with 2 1/2 inch chambers, would it be possible that they used a lighter load? Sincerely, Jeff