Going to buy a sumtoy choke for my 870 this weekend and am having trouble deciding which constriction, .665 or .670 ?
I have a 23" bbl and I will trying out winchester supreme HV 3.5" #5 shot 2oz &
winchester 3" #4 shot 1 7/8 oz
I am looking for a good hunting pattern, not too tight, out to around 40 yrds.
Thanks for any help you can give me !