If it's all matching headstamp, the bulge isn't too bad, and they look like they could be OF'd, I will take the chance they are OF'd and debulge them.
If there is a similar looking bulge in mixed headstamps from the same range find, I won't keep them, even if they look OF'd. That's a strange coincidence unless they're from the same reloader who fired them hot an unknown number of times.
It costs only ~$3, if you already have a 45 ACP sizing die. You just need a push stem and Lee sells them. I think Lee has a minimum shipping charge of $7, now. So price might be up unless you need more stuff.