Cuting my barrel on rem 1100

What I need is technical information on how to make it happen.

I though rem 1100 was the same concept as the Auto A5. Did I buy the wrong gun? Did Clyde widen the ports on this Auto 5?
 
Which gunsmith in Canada can do it for me if I out sourced it. I am pretty handy, so If I new what I had to do, I could do it.
 
The Browning is recoil operated. The Remington 1100 is gas operated. Apples and oranges. When you shorten the barrel, you change the balance of the gas system, which could result in malfunctions.
 
I chopped the barrel on my Win 1400 to 19" (I know this isnt a Rem 1100, but it is gas operated). It cycles slugs and buckshot perfectly, haven't tried it with any different loads though.
 
Don't know if this helps or not but if you know how to take it apart and check, from my books, Rem 1100 12gauge 2 3/4" has 2 ports of diameter 0.079" drill size #47, this size work for 30", 28", 26", and 22", any shorter than 22 inch is pretty custom,

But also, typically some other sizes for 2 3/4 inch is 0.086" drill size #44.
This is from my own research, I suggest if you are going to follow it, double check and triple check, and be sure you want to mess with it, tough to go back.

Good luck, post photo's as you go!
 
Remington 11-48 is a recoil operated shotgun with an appearance similar to the 1100's. Or the 1100's is similar to the 11-48's given that it was an ancestor.
Even then, cutting the barrel is going to change the weight of the recoiling parts, which is a factor in the functionality of the system, and perhaps its longevity.
Would you be shooting the thing enough for this to even matter?
 
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