Nice 10 bore. .775" is 10 bore. Round ball that size weighs, in pure lead weighs 700gr. obviously. 940gr. bullet is very short, considering the .600 Nitro uses a 900gr. bullet.

The 60gr. to 62gr. load would fit in the shorter case, easily, however it would also produce slightly higher velocity and higher pressure. Seems to me, the re-make should have been able to handle it, maybe not due to legal protection issues?

With plastic wads, a normal Blue Dot load with 2 1/2 ounces shot rarely exceeds 40gr. according to my Lyman shotshell book. The 940gr. barely makes 2 1/8oz. weight.

I was sure I had loaded 54.0gr. with paper wads in 3" plastic cases in my AYA with 2ounces #8 1/2's for decoyed ducks and snipe. Lyman's book stops around 43.0gr. with plastics in 3 1/2" cases.
Got 27 snipe with one shot, once, ground-sloused them on a mud bank.