Ok , Everyone I'm asking for Help here.

Today after being in a few stores for work , A gun caught my eye in a 20 ga. Since I built this new 20 Bennelli , I have thought of maybe getting the wife a 20 and noticed this shotgun. The gun was a Charles Dally 20 now not knowing a thing about these guns , I asked about the thread pattern in them for after market chokes. I was told it was a Winchester thread pattern.

Now my question is , Has or does anyone use one of these guns for turkey hunting and how well did the gun pattern or have it patterning now ? is there any out right problems with them ?
...BT