Well, this all started with a desire to lengthen forcing cones and open up chokes on a tightly constricted set of FW 16 ga. bbls and work to be done by a knowledgeable Elsie 'smith... I've followed the general logic of pressure vs recoil and, shot deformation impacts on patterns.. I found a nice lightweight and solid gun for grouse/wc and committed to opening up the chokes. The forcing cone request got overshadowed by short chambers which I already address by using appropriate ammunition. Turns out that the work got moved up in the queue overnight and the chambers are now 2.75". Oh well... I just wish more folks would recognize that when it comes to hunting, the extra $5/box for appropriate shells is immaterial when you add it all up. Live and learn...