Prepping New Brass

[Surculus Solitudo]

I will be using some new Winchester .243 brass to reload with.  The Lyman manual says I do not need to size new factory brass.  When I was inspecting the brass, I noticed some of the necks were not completely round so I am wondering how good the quality control is on the rest of casing.  I am thinking of running the brass through the sizing process even though they are new. 

What do you think is proper case prep for new brass?  Thanks!

[edward5759]

I do not prep new brass other than de-burr, size the primer pockets, chamfer the mouth of the case and neck size.
Small dents can't be squeezed out very easily and had no effect.
243 is a great cartridge, you should enjoy the loading of such a fine caliber.
ED

[dhhardw]

I typically run new brass through my sizing die to make sure that they are completely round.  I recall reading somewhere (maybe on a package of new brass?) that these get banged around in shipment and out of an abundance of caution they should be run into a sizing die before loading. 

I use a turret press, so the sizing is no problem just before priming.  Your case won't get stuck, because you aren't really resizing it. 

[gearheadpyro]

I full length size my new brass, usually just to iron the neck out though.

[1357MAG]

I know that other manufacturers do recommend that they be fully prepped. I always do as a rule of thumb.

[Toddco]

The only way to know if it is sized properly is to do it.  deburring the flash hole and case mouth is a must as well.  You may also want to check the primer pocket for uniformity.  Depending on what make of brass you may want to check it for length uniformity as well.  I always cut a very small amount off the mouth to make sure they are square.   I also check each one for consistent weight as well.  It all depends on how serious you are about preparation.