Should i resize new brass

A lot of bullets will seat no worries, but you might peel a few jackets on the rough necks. Gun control requires concentration and a steady hand. You beat me to it. Full length size for all out of the packet, and a trim wouldn't go stray if you feel like it.

There always a fraction longer than spec after you size them. Now every case in the batch will have identical outside dimensions. Important if you ever decide to weight sort cases but even if you don't the cases will be match prepped Chronos. Only thing I do not do is neck turn. Just mentioning that it's not the kind of thing you'll find if your average reloaders' kit.

Will I see a benefit in accuracy as they're potentially more uniform and also more uniform once load development is done and the cases are resized for the first time and loaded again? ChesterP Well-Known Member. I just neck size them, check overall length, chamfer and load.

I wouldn't bother FL sizing them as it works the brass for no real purpose. I have some new in PPU and that was checked, neck sized, loaded and shot. Last edited: Nov 9, You won't really work harden the brass at this stage if you do FL resize, I personally do simply to ensure they are all fit to chamber, just in case there are a few dents in the necks.

Muir Well-Known Member Supporter. There is a very sound reason for FL resizing new brass: It helps assure that on the second loading, the results will be closer to those obtained on the first loading. I always do it.

Click to expand Muir said:. Redneck Well-Known Member Supporter. I only full length resize new brass if it won't chamber in my rifle. Otherwise, I just run a mandrel through the necks to take out any dings. I take Muir's point that new brass and full length resized brass may perform slightly differently. Regards JCS. I don't feel the need to FL resize new brass. Jefro Relax-Enjoy. Never had to trim I know I was not sure.

I was kind of thinking they took the brass off the line before priming and loading. Size a few and you'll feel Run a piece you have already sized through again and feel the difference.

It it takes some effort and new brass will , it needs to be sized. Besides, what could be hurt by sizing it first? I would be surprised to find a manufacturer of new ammo does not have a sizing die in the process. I deprime and rotary tumble all spent cases - so they are only FL sized.

I vote for a definite "yes. When resized through RCBS die, it measures. Lyman specs call for. Interesting to note that new cases were. More interesting to note that resized cases through RCBS dies are. Important to me is not so much that they get resized, but that every round I load goes through same sizing process.

You should absolutely run new brass thru the resizing die. Have you reloaded in bulk before? Just curious if you are using spray lube or are still rolling cases thru goo on a pad?? Yes, I recommend that you run it through the resizing die. I have found that some "New" brass was not cut off properly, it was not square with the case. Check for proper case length, too. I size all new brass before loading it.

I don't trim pistol caliber brass, but do trim rifle caliber brass before loading it. I also chamfer the case mouth just a turn or two on the chamfer tool that helps eliminate any sharp edges Hit the new brass with One Shot and run it thru the sizer. If you do not lube, new Starline will give you a sore arm and shoulder.

Wow, I didn't realize how little I knew about reloading. Does resizing have to do with diameter or length, or both? Should I start lubing? So far I just tumble and load, checking for split cases. After I have shot it a couple times I no longer have to lube because there is enough powder residue on the tumbled case to go through my carbide dies. The first set of Starline were all different lengths and had to be trimmed. The last set were all perfect trim to length, so I sized and loaded them.

If you have been using a SDB, you have been resizing. I never do anything to overall length for main match ammo. Lubing makes the press easier to run for all brass, especially new brass.

One shot is in a spray can. Lay the brass on an old cookie sheet and a quick shot hitting some of the brass keeps dies slightly lubed. Certainly not mandatory but your arm will like it. I resize all my new brass now, if for no other reason of not wanting to pull the die out of the tool head. But even when I was loading on a single stage, I was resizing new brass.