Newbie question about disassembling and reassembling

[whirlybird]

I'm still working up loads for two rifles. I may have gotten ahead of myself and loaded up some things, and now may want to change what I loaded up - for whatever reason.

My question is this, will the act of taking apart and putting back together rounds appreciably affect the outcome of testing a velocity or seating depth test?

Anticipating the question of what i'm doing with the rifles... i'm learning. Certainly not going to any competitions or anything. Just wondering about the neck tension specifically. Normally I anneal between loads. Definitely not gonna do that with a primer.

No big deal? Big deal? Should I expect my data to be skewed in a specific way?

Thanks in advance.

[bumpo628]

I would deprime & resize a disassembled case before trying to reload it again. Since it is a rifle round, double-check the case length too.

[whirlybird]

Damn. I was hoping to get away with being lazy.

[croue]

[bumpo628]

You can reuse the primer after removing it.
Since it is rifle, the depriming rod is used to help shape the case mouth, so you shouldn't remove it. Just catch the old primers and reinstall.

[Donny1]

Not sure it matters but I always remove live primers gently.

[croue]

Depends on your dies. Most let the decapping pin to be removed without removing the sizing mandrel.


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[whirlybird]

I have Redding dies with the removable pin.

I'd really prefer to not mess with the primer.

So, I can just resize the neck (neck only is how i've been resizing), no anneal, and expect pretty much the same data that I would've gotten had I loaded them the right way the first time?

[whirlybird]

I'm not crimping these.

[damndave]

I used to do it all the time when needed. If you have a bullet puller and neck sizing die that would work perfectly.

If you are going to pop out a live primer, use a Lee decapping die and go REAL slow. I wouldn't attempt FL resizing with a live primer in the case.

[croue]

You can do exactly that.


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[TKM]

Look up Mexican Match ammo. It's a thing.

[whirlybird]

Thanks, friends. I'm glad to have you as a resource, and appreciate that I can ask these questions. Thanks for the help!

[pacrat]

EASY WAY

Pull bullets.

If same charge to be used. Place it in scale pan. If not, dump it back in appropriate powder can.

Remove decapping pin from expander stem.

Size case to reset neck diameter.

So, I can just resize the neck (neck only is how i've been resizing), no anneal, and expect pretty much the same data that I would've gotten had I loaded them the right way the first time

^^^YES^^^

Recharge..... Either using existing charge in scale pan. Or new charge.

Reseat bullet.

Absofreak'nlutely no need to fug around depriming and repriming.

[divingin]

Normally I anneal between loads. Definitely not gonna do that with a primer.

That's a wise decision. I know a couple of people who made that mistake. Once.

My question is this, will the act of taking apart and putting back together rounds appreciably affect the outcome of testing a velocity or seating depth test?

Velocity, maybe (though I would personally doubt it would show through the normal noise.) Seating depth no, since that's determined at seating.

Where you may run into problems is if you crimp; reseating a bullet in a previously crimped but unfired case might be problematic.

Worst case, you can pull the bullet, dump the powder, and resize without the decapping pin (make sure any air vents in the die are clear to avoid pneumatically pushing the primer out.) Use as little lube in the neck as you can get away with to avoid powder contamination.

Since you've reworked the round, expect small variations in results. I wouldn't expect them to be major.