I suppose it could matter, since Starline brass has a reputation for being thicker and lasting longer, the cases could be inferior if they aren't made by Starline to Starline specs.
Exactly. When I first started to reload .32 H&R Magnum (many moons ago) I just kept having case mouths splitting. A crack from the case mouth and halfway or more towards the head. With loads that weren't anywhere near too hot. I was getting really frustrated and thinking all this .32 stuff is a problem when somebody told me it could be the once fired Federal brass. I got some Starline brass and literally _never_ got another split case. Even with very hot loads.
Hopefully it is different with .327. And, as was said, maybe Starline is making the Federal .327 brass.
Gregg