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  #1  
Old 05-24-2019, 7:49 AM
johncmng johncmng is offline
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Default Is it safe to resize live ammo?

I have a bunch of 308 that I made for my remy 700. I don't shoot it much any more, so I want to use the ammo on another rifle. Is it safe to resize it?
Thanks
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  #2  
Old 05-24-2019, 7:53 AM
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Do you have a die capable of sizing with the bullet in place or are you saying you will pull the bullet and size the primed brass?
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Old 05-24-2019, 9:28 AM
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yes
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  #4  
Old 05-24-2019, 10:27 AM
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It probably is as long as the die is large enough to not pinch the bullet with the expanding rod and decapper pin screwed out of the die.
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Old 05-24-2019, 10:32 AM
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Why would you need to resize the loaded ammo for another rifle?
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Old 05-24-2019, 11:17 AM
Divernhunter Divernhunter is offline
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I would pull the bullets and resize them properly.
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Old 05-24-2019, 11:22 AM
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if the other rifle is also chambered in .308 the current case sizing itself should be ok. i'm assuming your just wanting to change the overall length. if that's the case, then should not be a problem to shorten the overall length.
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Old 05-24-2019, 11:57 AM
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Cannot resize loaded ammo in a sizing die. It makes the bullet undersized and loose in the neck.

OP, does it not chamber?
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Old 05-24-2019, 12:52 PM
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Quote:
Originally Posted by Divernhunter View Post
I would pull the bullets and resize them properly.
this.

I would never put live ammo in a die and push the press ram on it.
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Old 05-24-2019, 12:55 PM
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Quote:
Originally Posted by MarikinaMan View Post
this.

I would never put live ammo in a die and push the press ram on it.
then how would you seat the bullet?
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Old 05-24-2019, 1:08 PM
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9 out of 10 people who ask that question prefer a heavy hammer to resize before reconstruction of the face and body can begin.
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Old 05-24-2019, 1:12 PM
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Quote:
Originally Posted by johncmng View Post
I have a bunch of 308 loaded. Is it safe to resize it?
Thanks
Just to simplify the thought process.

The answer is no.
Not without taking them apart.

Unless you plan to shoot them in a much tighter chamber, just shoot them in any 308 and then reload accordingly.


Best
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Old 05-24-2019, 1:20 PM
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.308 loaded for a 700 should work in any .308 made without resizing. My Lee factory crimp die actually crimps and checks the final size of the loaded round....now if your talking about bullet seating because you find them to long for your action you will get shavings or jacket damage...

Last edited by Bobshouse; 05-24-2019 at 1:24 PM..
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Old 05-24-2019, 2:50 PM
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Safe?

No.
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  #15  
Old 05-24-2019, 2:55 PM
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Quote:
Originally Posted by God Bless America View Post
Cannot resize loaded ammo in a sizing die. It makes the bullet undersized and loose in the neck.

OP, does it not chamber?

As GBA noted. Pulling the decapper and resizing loaded cases. Makes the neck area undersized with bullet also effected. They will likely chamber and fire fine. But the "now undersized" bullets will travel down the bore like a hotdog thrown down an alley.
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Old 05-24-2019, 3:13 PM
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Use a body die. No neck sizing.
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Old 05-24-2019, 5:18 PM
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Is it safe? I have no idea.

Would I do it? No freakin' way.

I've made a few rounds of .223 ammo that wouldn't chamber, probably because I had no clue what I was doing at the time when I sized them. They get pulled apart, the components get recycled, and since I use to different powders for .223 rounds, the powder is converted to fertilizer.

Here's another way to think about your question: will you save enough money to pay for a potentially sizable hospital bill if something goes wrong?
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Old 05-24-2019, 6:35 PM
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Quote:
Originally Posted by crowbar View Post
Use a body die. No neck sizing.
Winner.

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Old 05-24-2019, 8:58 PM
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I have heard more than once not to resize assembled cartridges.
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Old 05-24-2019, 9:00 PM
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how many are you talking?

how were they sized the first time can you get by with seating the bullets a bit deeper?
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  #21  
Old 05-25-2019, 3:02 AM
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To expound on my “Use a body die...” answer, I have safely and successfully done just that to about 1k .308’s when I got a new Palma rifle, 700 .30-‘06 rounds that I was gifted, and six boxes of .260 ammo I reloaded for my M7 that wouldn’t chamber as easily in my friend’s M7. The Redding body die is perfect for this work as it will size the case body and bump the shoulder yet doesn’t touch the neck. I lubed the cases with Imperial die wax before running them into the body die.
But before all of that, I used my Case gauges to determine just what was out of spec compared to the chambers that would not easily allow the loaded rounds to seat fully. The case shoulders were all within spec, but the case body’s were a little too fat - I had only neck sized the .308 and .260 ammo as that worked fine in my rifles. Guessing my friend had done the same with his ‘06 ammo. Chambers vary.....

I would not do this loaded ammo resize using a standard FLS die with the
/ neck expanding stem removed. Spring for a Redding body die.
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  #22  
Old 05-25-2019, 4:16 AM
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Quote:
Originally Posted by MarikinaMan View Post
this.

I would never put live ammo in a die and push the press ram on it.
Quote:
Originally Posted by ragenmoan View Post
then how would you seat the bullet?
LOL! Or remove the bell and crimp the brass?

OP, I run out-of-spec pistol cartridges through a Lee Bulge Buster all the time. It might not be what you’re contemplating, but it’s similar.
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  #23  
Old 05-28-2019, 8:22 AM
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If the ammo was full length sized for the 700, it *should* be fine with the new rifle. If it was neck-sized only, it *may* (or perhaps *might*) be fine with the new rifle. Only way to tell is to check.

If it does not chamber, the body die will perform the shoulder bump and body sizing necessary and still be relatively non-risky. Probably not worth buying one for a few (or even a couple of hundred) rounds of ammo, unless you have a plan to use it regularly.

You can't use a "normal" full length die on a fully loaded cartridge and expect it to shoot, as it operates by opening the neck up as the sizer ball goes in, sizing the neck smaller than desired at full insertion, then opening the neck back up to final dimension as the ball is removed. Sizing a loaded cartridge will seriously undersize the bullet (assuming you don't crush the case trying to swage the bullet/neck diameter down.)

If you need to resize the ammo and don't have a body die, pull the bullet and powder, remove the decapping pin from a full-length sizing die, resize, then re-insert powder and bullet. You'll need to lube and clean as appropriate (a dry lube would be handy here, as no risk of contaminating primers.)
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  #24  
Old 05-28-2019, 8:25 AM
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One of our range officers at our local IDPA match (Piru) showed up with a huge, club-like bandage on his hand one Saturday a few years back.

It seems he was resizing some .556 and nearly blew his hand off.
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