Re: It ain't going to fit
"I'd haven't measured it but I believe only about 62-62.5grs. will fit. Is the manual wrong or what."
For your case, it's "wrong", your case is different from what their's was.
That's part of why they tell us not to go directly to any listed max load, our components and firearms are different from theirs, we are to start low and only go higher IF conditions allow it. Accepting that is part of the reloading learning curve.