Ammunition & Hand Loading > Cartridge and Shotshell reloading

Reloading 300 wing mag questions

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SemperFiGuy:
skydve76:

Your post didn't provide a picture.   Nevertheless, the "bright ring forming down by the rim" is potentially a matter of serious concern to reloaders.

One cause for that bright ring is excessive headspace.

On firing, pressure inside the cartridge case forces (clamps) the cartridge case firmly against the inside of the chamber, holding the front end of the case tightly in place.

If there's excessive headspace, then the head of the cartridge moves backwards, stretching the brass in the case, making it very thin at the bottom of the cartridge case down by the rim.

Evidence of this condition is usually in the form of a bright ring around the case, near the rim.

The case is very thin at that point AND MAY BLOW VIOLENTLY.    Which you do not want.

SUGGESTION:
In the interests of your safety, be willing to sacrifice one case.    Cut it lengthwise with a bandsaw or a hacksaw.    Look for thinning in the wall section near the bright ring.

If thinning is found, DO NOT fire a round which evidences the bright ring.   It's a KA-BOOM waiting to happen.


sfg

bk09:
You can also try the paperclip trick to check headspace. Open a paperclip and rub it on the inside and if you feel a lot of room where the ring is then I would toss them all. Saves you the trouble of cutting them up.

skydve76:
Thanks guys for the responses.  The gun a savage Ba-110.  I could not imagine it having headspace issues.  I forgot to mention the carts are banded, so the ring is right above the band.  Does that change things?  I'll check it out, if the round is stretching I can compare it to a new round of the same brand and should be able to tell do you think?

Let me get a pic too. 

bk09:

--- Quote from: skydve76 on January 23, 2012, 11:39:16 PM ---The gun a savage Ba-110.


--- End quote ---

 :o Drool!

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