Thank you. I just measured a few of the AAHS hulls I have and they average about 2.68". The gun is sn 382xxx. If I looked at the chart correctly that makes it a 1923 gun. According to a book I have Ithaca went to 2 3/4" chambers in 1924. I believe I can trim those ten to twelve hundredths off the hull (if necessary) to get them down to 2 9/16". I only plan to shoot 7/8 or 1 oz loads in the gun. Most of the 1 ounce shells I loaded years ago has slightly dished crimps and could stand a little shortening anyway. What is a safe pressure limit on this gun? I plan to shoot it no more than 200 times per year.
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