some where a few months ago I saw a summary of gas port sizes. Differentiated gauge plys target, regular and magnum dimensions. I lost it and need to refer again. Appreciate your help.
Interesting follow up here.
The 1100 I was trying to recover was an old 20 Ga standard( large receiver) that had corrosion on the mag tube and rings. Probably salt water. This poor gun had had a hard existence in its life . Would not cycle standard 7/8 loads. Only heavy high brass 1 oz. Thoroughly cleaned every thing but still failed. Did following in sequence; Changed o-ring, changed the piston rings, After calling Remington they helped by telling me the original ports were the .078" - #48 drill and if I were to drill only go a step up in the # drill sequence, one step at a time. In this case the next step is a 5/64" fractional drill. I got a fresh new drill and used a fine grade of light gun oil to lube and drilled out. Go very slow and do not push hard and hold straight to avoid breaking the drill. Took only one step and it made a big change in performance. One step and every thing checked out great. Now to refinish the stocks and I will have a really nice, old - but sound 1100 20 ga. The barrel is a IC choke which should work for 99% of my needs.
Interesting follow up here.
The 1100 I was trying to recover was an old 20 Ga standard( large receiver) that had corrosion on the mag tube and rings. Probably salt water. This poor gun had had a hard existence in its life . Would not cycle standard 7/8 loads. Only heavy high brass 1 oz. Thoroughly cleaned every thing but still failed. Did following in sequence; Changed o-ring, changed the piston rings, After calling Remington they helped by telling me the original ports were the .078" - #48 drill and if I were to drill only go a step up in the # drill sequence, one step at a time. In this case the next step is a 5/64" fractional drill. I got a fresh new drill and used a fine grade of light gun oil to lube and drilled out. Go very slow and do not push hard and hold straight to avoid breaking the drill. Took only one step and it made a big change in performance. One step and every thing checked out great. Now to refinish the stocks and I will have a really nice, old - but sound 1100 20 ga. The barrel is a IC choke which should work for 99% of my needs.
