flagflyfish

When using new/unfired brass is it necessary to full length size it? Once it has been fire formed I plan to only neck size it, and sort it for weight+/- .2gr

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Cloudpeak

I assume you're asking about rifle cartridge reloading? When I used to reload for rifles, I always full length resized, new brass or fired and never weighed the brass. The last long gun I sold, a Ruger 77 270 shot under an inch at 100 yards. The owner says it still does. (Man, I loved that rifle but, due to shoulder problems, no longer shoot long guns.)

Cloudpeak

sniper58

From a rifle standpoint, I don't usually find it necessary to resize at all with new brass. The worst thing I've had to do is run a few dented cases through the resizing die to get the necks straightened out. Having said that, my results speak for themselves. With my .30-06 and Hornady 165 gr. SST's, I consistently get .40" at 100 yards, 1.2" at 300. The 180 Hornady Interbond groups worse. I only get .70" at 100 yards and 2.3" at 300 yards. I can't speak of pistol reloading as I am not there - yet.

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Ram Rod

My equipment resizes the case neck only. On second reloads, I'll end up needing to trim the cases. Brand new nickel plated cases should be sized before loading the first time. I also check cases for thickness and turn the necks when needed. I load for the 6.5x55, .308, and 22-250.

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coffeecup

Ammo for serious target shooting should be neck sized only, after fire forming.

Try this one on for size: Back in the days of my avid groundhog hunting I neck sized .243 rounds then used a 1/4 drill bit to remove the brass that had flowed into the case neck, then neck sized the second time. Oh the joys of being too poor to afford a case neck turner.

Tubby45

Yes. FL size first, then neck size until it won't chamber then FL size again.

All hunting ammo is FL sized as function beats accuracy.

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