I find it interesting that both winchester and Remington say (on the box),not to shot in guns weighing less than 10Lbs 8OZ. I have # 500322 and #500422. #500322 has factory 28 In. barrels and weighs 10 Lbs. on the nose. # 500422 has 32 In. barrels and weighs 10 Lbs. 6 Oz. Over the last 40+ yrs. I have shot these guns a lot, and never found recoil to be a problem. Early on I had both guns to Frank Lefever for new rotary bolts, but never any other kind of a problem. (They have been shot a lot).
With BPD and Reloading Specialties offering so many good wads and componets along with Data. You can now make your Ithaca ten shoot better than Elmer's gun, and do it with less than 2 OZS. of shot. (even less recoil). I sometimes shoot Nickel Ts and size BBB lead shot. All sold at BPD, and they seem to sell a lot of it.
CJO
I do like the picturs of your gun You are a lucky fellow. Let us know how it shoots. If you are ever in Boise Idaho stop at the Elmer Keith Museum, and look at Elmer's gun. Good Luck