Bullet seating issue

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I loaded up some 458 winchester mag rounds this morning with some Barnes 400 gr bullets. Everything seemed fine until I looked at one of the rounds and I was able to just give the bullet a very tug and it came out. The bullets themselves have 2 cannelures on them. I have the bullets seated to the right depth for the correct o.a.l. I have a box of factory 458 rounds and I checked them and they don't have any crim. Do I need to be putting one on these reloaded rounds?
 
how are you sizing your brass?
how many reloads on said brass?
Have you annealed the brass if you have reloaded them several times?

If your properly sizing the brass and it's not hardened from to many reloads then it should be able to hold the bullet without a crimp.
 
Spawn-Inc said:
how are you sizing your brass?
how many reloads on said brass?
Have you annealed the brass if you have reloaded them several times?

If your properly sizing the brass and it's not hardened from to many reloads then it should be able to hold the bullet without a crimp.
Click to expand...

I have an RCBS 458 win mag die set and it has the sizing die. The brass are all 1x fired (no doubts to this as I bought them all as factory rounds myself).

When I was loading the rounds this morning, one of the bullets just "fell" right into the casing after being sized. I found that odd, and now this other one was able to come apart with a very gentle tug. I can't gently tug the bullets out of my factory 458 rounds. Seems to be that I shouldn't be able to do it with a reloaded round either.
 
Assuming bullets are .458 and die is correct then most likely cause is an oversize expanding button in the die. Wouldn't be hard to have the wrong rod put in the die at the factory. Properly sized necks should hold the bullet firmly with neck tension alone. Crimping is not the solution. You need to find out what is wrong with your die.
 
RMacD said:
Assuming bullets are .458 and die is correct then most likely cause is an oversize expanding button in the die. Wouldn't be hard to have the wrong rod put in the die at the factory. Properly sized necks should hold the bullet firmly with neck tension alone. Crimping is not the solution. You need to find out what is wrong with your die.
Click to expand...

Just checked with my digital caliper. Both the bullets and the expanding button are correct.
 
The bullets shou,d be held in firmly by the neck. Crimping is a bit of extra insurance. If your cases are not holding the bullets it is either the expander plug, as mentioned, or it might be your brass. Try the bullet fit after sizing but before expanding.
 
Try running your prepared cases through the resizer die one more time with out the decapping pin and expander. . You don't need to remove the new primer, just apply a small amount of case lube and run them up the die easy like. . If you've chamferred and bevelled the neck mouth after trimming the cases the bullets should press into the correct depth and the neck should hold them properly.
 
If the FL sizing die is properly adjusted and the correct diameter expanding button used then the correct amount of neck tension should be realized. A hardened neck may not be as elastic as a softer one but it should still be tight enough not to let a bullet drop into the case. The only time I have experienced loose neck tension was when using a FL die to neck size some 35 Remington cases.
 
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track said:
Check your bullet dia., possibly a manufacture issue with Barnes.
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That is what I was wondering. Then I went looking for a Barnes 400 Grain .458 projectile and couldn't find one on the Barnes site.
OP, what is the exact info on the projectile? Also, it would be interesting to know the diameter of the proj.
 
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