How do you tighten a 12 Ga. pattern?
Is anyone familiar with how shotgun shells were reloaded before shotguns had adjustable or interchangeable chokes? I have a BT 99 with a fixed choke (I.Mod.) and would like to tighten it up some. The I.M. choke is good at 16yds.,but not so good at the 21 yd line.