Is it possible that your shotgun was produced when card and fiber wads were the norm?
An option to opening up your chokes and a lot less expensive is to load spreader loads with either 1-piece plastic wads or C&F wads. I have had good success and have opened chokes up by one choke. EG: Full to Mod, Mod to Imp. Cyl.
Can't remember the exact date but my AyA was made about 2005. It was definitely set up for plastic wads but appears to have been choked much tighter than marked on the barrels.
I have never seen spreader loads for a .410. Are they commercially available or a hand loading only proposition?
Thanks.
Dennis
