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seedy 03-12-2008 05:06 AM

resizing new brass
I have a question. I have been resizing new unprimed brass before I load it for the first time. Is this necessary? I read an advertisment that touted that you can just prime and load their new brass. Sizing new brass is tough and I would really like not having to so it. Thanx:(

robocop10mm 03-12-2008 01:17 PM

Depending on the caliber your MAY need to resize. The new brass MAY not be perfectly dimensioned for your gun. After it is formed it is polished. It MAY get deformed during the polishing process. Some calibers are thicker or thinner than others. For example, .45 ACP I would not worry about it as it is fairly thick. .44-40 would need to be sized as it is very thin and easily deformed. The resizing should not be difficult as the brass is very close to proper dimensions already.

1hole 03-12-2008 07:55 PM

Is it "necessary"? No. Is it advisable? I think so.

seedy 03-13-2008 01:06 AM

thanks guys now I don't feel so dumb. I bought new star line brass for my 45-70 and 41 mag. and was arm weary by the time I sized a hundred cases.

marysdad 03-13-2008 04:33 AM

It is completely unnecessary to full-length size new cases for almost all firearms. (You don't think that the ammunition manufacturers do this, do you?). The exception would be a custom-barreled benchrest or match rifle with a very tight chamber.

If your new brass is boxed, so that the cases are separated during shipment, no sizing at all is necessary. If your new brass is bulk-packaged (i.e., loose in the box), it is good to run the necks through the expander ball to round out any dents or eccentricity in the case mouth that may have occurred during shipment. However, there is no need to full-length size.

cpttango30 03-28-2008 05:34 PM

Most of the time you can bet your life that you are going to have a few bent necks. For this I go and resize first no matter what.

2gun 03-30-2008 01:30 AM

I always do but I'm not sure why

RePete 03-30-2008 01:41 PM

When you resize new brass, all you are doing is uniforming and making sure that the necks aren't dented.

I say that it's necessary.

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