Case mouth not flat

[Datz]

Hello
I'm pretty new to reloading so I hope this isn't to dumb a question, tried a search but couldn't find an answer.
I went to reload some once fired Winchester 30-06 brass I had loaded the first time (no problems) and after resizing the case mouths are not flat across the top. I'm using an RCBS single stage press with basically brand new dies. None of the cases are longer than the max length, even at the high point, but is this an issue and should i be trimming to uniform everything or is this nothing to worry about until I reach max case length.
Thanks for any advice for a newb.

 

[dan belisle]

Trim them uniform. Angled/uneven case mouths will give erratic crimp pressures. This in turn can give you erratic velocities, which can lead to poor accuracy. - dan

 

[iceman2]

A Lee case trimmer works great and is inexpensive.

 

[TwoTone]

If you're not crimping then it's of no concern, just wait until they approach max length then trim.

If you are crimping then: what Dan said.

 

[Datz]

great, thanks for the help

 

[Chinbullco]

Datz

Case mouth should be square to center line of cartridge, as this controls the bullet being seated square. If one side of case mouth is high bullet will be seated a bit off center line of cartridge. Not all case trimmers are capable of making a straight cut.