Looking for advice on necking down brass for wildcat

[CaptainChilders]

I have 150 new brass for a 7 Mega by Sherman Wildcats which for those unfamiliar is basically a 7wsm with an improved shoulder. The brass new comes in 30 cal and needs to be necked down. I’ve done quite a bit of reloading just for some reason have never necked brass down. I’m sure theirs several ways to do it but I was hoping to get some insight from someone with some experience in the matter. I have a Hornady full length size bushing die and 100 brass that were already necked by someone else but their primer pockets are giving up. I do not have a neck turner and also looking to see if I need one. What’s your method?

 

[Jonas]

Anneal first if you can, use good case lube, and neck them down gradually with progressively smaller bushings instead of doing it all at once. After sizing, trim and chamfer the cases and check neck thickness/runout. Most guys don’t need a neck turner unless the necks thicken up enough to cause tight chambering or inconsistent tension. Since you already have formed brass, measure loaded neck diameter on those and compare it to the new stuff that’ll tell you pretty quickly if turning is necessary. Also watch for donuts forming near the shoulder after a few firings.