You must have some real monsters, lol! I weighed several old, retired breeder mice and they were mostly around 40 grams, give or take a little. None hit 60 grams. And I weighed some young adult, just starting to breed (but not retired breeder) ASF rats, and they all weighed 70 - 80 grams, except for one that actually did weigh 83 grams. I am sure some of the big, old breeders would go over that, but I didn't have them handy.
I am lucky enough to have a colony of non-biters, thank goodness. Here is my 2 cents on some of the topics in this thread:
We cleaned them today (what a pile of babies!) and installed some ceramic dog dishes in the corners of a few of the bins to see how it works. We also made some hide boxes a couple of months ago, featuring a framework of scrap 2x4, over which we lay old cardboard. It is interesting to note that the moms with small babies seem to hang out on one side, while the older babies and other adults hang out on the other side. We feed our ASF on Teklad lab blocks, same as our rats. I would like to give them some hamster wheels, but I think the small ones might be too small, and the rat wheels might not fit in my bins. Will have to buy one of each and give it a try.
I really am enjoying these far more than I ever did regular rats or mice.