Extractor marks normal?

[JRBullock1987]

This is a 5.56 factory load: frontier 75gr bthp. Does this mark on the brass casing mean that it's having pressure issues? The mark on the right case isn't as bad. I planned on starting to reload for this rifle but if its having weird pressure issues with factory ammo I'll get a new barrel. I go/no go gaged with both passing. Its an 18" ba .223 wylde spr premium series barrel, bcm bcg. Suppressed with a oss hx HD 7.62 can.

 

[camocorvette]

Looks fine to me for factory ammo. The frontier ammo I've shot seems to be warmer then some loads. No issues with it.
Those are definitely not reasons to buy a new barrel either. If it's shooting well keep going with it.