PN,
I do not have a 'souvenir' chain from my time on the Hercules but a diminished memory suggests the links may have been approx two inches long. But I am happy to be corrected. We did not adjust the W and B for the redistribution of said chains. When they were used for tying down cargo the redistribution of the chains was not taken into account as the C of G tolerances of the mighty Hercules were more than sufficient to cope with such a small change.
We also had 5000lb chains on the a/c and there was a school of thought that with the links being smaller they might be a better protective bet !