Jalo, welcome to the forum. Your question is one I considered many years ago, and answered to my satisfaction. I bought a 30" barreled BSS that was also choked M and F. I tend to like tighter chokes than many, so I had the full choke barrel opened to the exact same constriction that the modified barrel was ....... .018". I have shot so much heavily loaded steel through it that I have shot it off face and now have to shim it .003" to keep it tight. But, more importantly, I have never had a reason to regret the choke decision.

IDK if it matters to you but I shoot primarily steel 4s and 3, with a few 2s on occasion. Works great for me, and never a problem with the steel shot. It's plenty tight, but doesn't cause meat damage even on an unexpected close shot.

Best, SRH


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