Listen to Mule Deer. I have a 870 that has not had the IC choke out of itother than to clean it every now and then for probably 20 years. I have shot every thing including water fowl with it in that time. Depending on the brand even the Wally World discount loads will pattern 45-50 % at 40 yds. With good hard trap loads you can add about 10% to that average. I have found it even works fine for trap to probably 22yds giving good solid breaks. With today's wads IC is the best all around choke for most hunting conditions.
