After pulling bullets do I need to re-size necks before using the primed brass to load new bullets?

[valleyforge.1777]

I want to pull the bullets from some loaded ammo and then use the primed brass to load other powder and other bullets. I will be using the grip-n-pull tool with each round mounted in a case holder in a single stage RCBS press for the pull process. Do I need to re-size the necks before loading new powder and bullets? If so, I know that I need to remove the decapping pin from the resize/decap die.

I have some factory-loaded 7.7x58 mm Japanese ammo from PCI cartridge company. The bullets are .310 and are too small for my rifle, giving shots that spread out wildly. From the looks of the rounds, it seems likely that the manufacturer was using bullets pulled from some other ammo, perhaps 7.62x39? I will probably discard the powder because I don't know what they used to load the ammo, but I want the primed brass to load my own ammo with bullets of .311 or .312 diameter. Hornady 7.7x58 factory ammo (from 10+years ago) with SP and with SST bullets makes much better groups than the PCI ammo.

 

[troy fairweather]

depends on the case and the neck thickness, you will have to see what the neck tension is what grain are the 310 bullets and how many do you have. the 150 hornady do pretty good.

 

[243winxb]

Going from a 310 pulled to 311 or even better, a 312 should work. The case needs to be brass, as brass has a memory and will spring back. Steel case, dont know?

Measure the OD of the case neck before and after seating the larger bullets. If its expands by .002" thats good to go. As little as .001" would need watching for bullet movement. The .001" is NOT for auto loaders.

Is there any sealant on the pulled bullets or necks , like some military ammo? Could make a difference??

Edit. Checked ammo. New brass should work well. https://www.grafs.com/catalog/product/productId/11970

 

[lightman]

Going to a bigger bullet you should not have to. I probably would just in the name of consistently.

 

[mdi]

Yes, good practice. You will know for sure what your brass measures...

Remove the decapping stem from your die and just resize them. Quick, easy, and faster than doing any testing, checking or measuring... K.I.S.S.

 

[rsrocket1]

I would test a few to see if it makes a difference. Most brass cases can handle a bullet pull and reseat and not suffer from neck tension problems. I've done that on 9/40/45ACP that have never been annealed and I'm sure they've been loaded and reloaded a half dozen times. If I knock a bullet out, recharge and reseat a bullet, there is plenty of tension on the bullet provided it was sized to begin with.

Try it out with a couple of cases. After seating the bullet, push down on it to see how much force it takes to get it to go in further. If you can't push it in without leaning into the bullet, your're good to go. If this is for a single shot rifle or a bolt gun, you probably don't even need that much tension.

 

[The Hulk]

Yes you do, resize the neck again I loaded some 30-06 for a friend he had some core lokt wasn't giving him the knock down he want so I pulled the pills . The neck felt tight I use new powder and some SST , he went hunting didn't see anything and when he unbolted his gun ,bullet came out of case and gunpowder every where. I learned from my mistake never to do that again, When I pull bullet always resize the neck for better tension

 

[Fine Figure of a Man]

I would

 

[Hooda Thunkit]

I have done it 2 ways:

Either resize neck, usually with a neck-sizing die, but a regular sizing die with the mandrel removed would work,
Or
Seat a new projectile in the non-sized neck, then run it through a Lee FCD for a rifle. Leaves a nice collet crimp.

Never had a problem either way.

 

[Herman B]

Do I need to re-size the necks before loading new powder and bullets?

If firing from a single-shot rifle, no. If rounds are subjected to recoil in a magazine, yes.

 

[FROGO207]

If like 243winxb says you get expansion then should be OK. Personally I would resize the necks just for the sake of identical bullet seating tension anyway. Just me trying to get as much accuracy as possible.

 

[Ks5shooter]

yep will take few minutes.......why risk it.

 

[higgite]

Of course you can do what you want, but my practice is that if I have any doubt, I do what I can to remove the doubt. I'd resize them. ymmv

 

[ArchAngelCD]

I wouldn't bother if accuracy wasn't already a problem. Since you are chasing accuracy I would remove the possibility of the necks causing inaccurate ammo just in case the ammo is still not accurate.

Like said above, it will only take you a few minutes to size the brass.

 

[Swampman]

PCI = Pretty Crappy Ignition

No experience with the 7.7, but a friend bought a couple boxes of their 6.5x50 and had two hang fires in the five rounds he fired before I convinced him to stop shooting it.

No real idea what caused the problem, but he said he'd fired a couple boxes of Norma over the years with no issues.

If it were me, I'd partial length resize the cases (without touching the shoulder), but I might consider repriming as well.

 

[Big7]

Yes you do, resize the neck again I loaded some 30-06 for a friend he had some core lokt wasn't giving him the knock down he want so I pulled the pills . The neck felt tight I use new powder and some SST , he went hunting didn't see anything and when he unbolted his gun ,bullet came out of case and gunpowder every where. I learned from my mistake never to do that again, When I pull bullet always resize the neck for better tension

There you go. Anytime you manipulate the case, ALWAYS re- size. That's a no- brainer.

Just Sayin'

 

[Hondo 60]

I would

^^^^^ Yes, I would & did just last night.
Starting a new bullet design & made a dummy too short.
So I used a kinetic hammer to remove the bullet.
Then I resized the case to make a charged round.