Dan, to know what the chokes really are you need to measure the bore and the end of the barrel. You could have bores as big as .740 or more. Those bore gauges are only good if the bores are .729, and many modern guns are back bored, the old ones were made larger or have been honed at some time. You have tight chokes, but could be more than you think. For 3/4oz shot loads, most like about 1300fps to get the pattern to open a bit and not get a " hot center". Tom, I believe Precision Reloading will test shells for $5 a shell. Tom Amberst [ SP ?] will also do it for about the same price.
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Paul Harm
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