I have dealt with both Mike Orlen and Dean Harris. My advice would be to call Dean Harris at Skeet's Gun Shop in Tahlequah, OK. Dean is a prince of a man and very knowledgeable about barrel regulation in S X S doubles.
I had learned of Dean's procedure to enable the center of one barrel's pattern to be moved significantly in any direction. I called him and told him of my 20 ga. AH Fox Sterlingworth Ejector that crossfired by 8 inches at 25 yds. (both barrels equally), with 7/8 oz. loads at 1250 fps. He said it was a tall order to move the patterns that much but to send it to him.
A short time later I received a call from him. He told me that he had it regulated perfectly at 25 yds. by just changing loads. He went to a 1 oz. load at 1160 fps and the patterns centered perfectly atop each other. He said he never had to do a thing to the barrels. Though I was ecstatic to have it regulated I had really wanted to use 7/8 oz. loads in it. While he had it, he opened the chokes from Modified right and Full left to .006" R and .016" L, at my specs.
First time in the field with the gun, on quail, I doubled with it on the first cover rise. I don't worry about having to use 1 oz. loads in it anymore. Evidently that's the load it was made to be used with.
You won't go wrong with Dean. He is very easy to talk with over the phone.
Dean Harris
918-456-4749
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