Okay, final results for anyone setting up a CZ Mallard 20.
Trulock extended Huglu IM in top barrel (rear trigger), Trulock extended Huglu 555 in bottom barrel (front trigger). Sumtoy would be my only other choice.
Holosun 509t green dot mounted to rib with Truglo RMR mount.
Both points of aim are half way between top of head and where the feathers meet the caruncle. That is the point I natural tend to aim at with all my other guns.
41 yards, Fed Heavyweight #7 3" 1.5 Ounces
20 yards B&P #7.5 1 ounce
As you can see there is a bit of difference in POI, the 7.5 are tiny bit high, the #7 are dead on. I also shot the 7.5 and 15 yards and the 7s at 20 yards. Dead on with both and not overly tight.
You could definitely chase numbers and get a better pattern with TSS at 40, but I still have a case of these shells and they have never failed me (got them when rumors started they were gonna D/C and got them dirt cheap).
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