Resize Factory Case?

I always do, it doesn't take long and it is a lot easier than having to pull bullets and doing it later.

Always resize new brass, it just solves any problems you may have later on.

I've been sizing up all my new brass. Who knows how bad it got tossed around before you got it.

I always back the sizing die off a couple of turns and just work the neck. I apply a very small amount of lube to every 5th neck or so. Then I deburr inside and out.

Size new brass ? Absolutely.

And then deburr the flash hole, uniform the primer pocket, outside turn the necks to a uniform .010", trim to a consistent length, chamfer and deburr the neck. Then weigh and mark them all.

After all that, you'll be too tired to load them, so take a nap. There's always tomorrow.

I always do. Tried cutting corners and loaded some dummy rounds on "ready to load" brass.... not one would chamber. Had to full length size "ready to load".

The only process change I skip with new brass is tumbling. So far I haven’t had factory brass that needed it. Changing a process brings back memories of a lot of time spent analyzing change requests. Good luck.

Yes. Brass gets jostled and bumped around during shipping. Always resize even new brass.

I figured it wouldn’t take me long to find an example, of why I always treat new brass the same as fired, so it tore the top off a bag of new brass and in the first handful I found this one.

I would chamber and try and find headspace before changing anything on that brass. Some preparations are in order to make sure the neck is round and set neck tension and a little chamfer action to be sure. You may find that a standard die is moving way to much brass for no reason. Your plan to shoot lead means that the neck will end up being moved excessively. I dont have a complete plan yet but this might be the rifle that I get custom sizing dies made. It's not like the brass is easy to find or cheap.

It depends. I have some Lapua .223 and Norma 270WSM that is GTG without sizing. Most other brands need something to be sure they'll fit.

Depends on the brass and what it's going into. If the brass is really banged up, I'll size the neck, just to true it up and provide good neck tension. I usually don't get carried away with brass prep until after I've fired it once in the firearm it's going into.

Walkalong said:

I like to do it, but it isn’t always necessary

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What he said ... in addition, I also check length & chamfer/deburr my factory rifle brass.

Mark_Mark said:

for consistency? that was my thoughts too

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I actually only do it because of my bad luck and if I believe they are perfect from the factory, they won't be and I would have to pull them and resize HAHA

I always resize new brass. It keeps things consistent in my loading process.

jmorris said:

I figured it wouldn’t take me long to find an example, of why I always treat new brass the same as fired, so it tore the top off a bag of new brass and in the first handful I found this one.

View attachment 990821

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Typical of Winchester for the last few years

Hooda Thunkit said:

Size new brass ? Absolutely.

And then deburr the flash hole, uniform the primer pocket, outside turn the necks to a uniform .010", trim to a consistent length, chamfer and deburr the neck. Then weigh and mark them all.

After all that, you'll be too tired to load them, so take a nap. There's always tomorrow.

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You forgot to add and Wet Tumble, then had dry each one with a micro fiber cloth, then measure the internal volume of each on

Mark_Mark said:

Wow this is getting complex for a quick question. this is what I’ll do, completely resize a used 7.7, completely resize a new 7.7. Then compare the new resize with new brass.

Brass is old Norma, I might have gotten lucky but this brass was difficult to find. This might need a “7.7 Arasaka Journey” project

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Well if it is old Norma is it really "new"?

Regardless every time folks reload "used" brass they resize it so why not new brass. Not like it takes any extra time.

There is NEW brass in 7.7 available several places.

I have never had new brass. Never.