Having a tight Headspace saves on overworking the brass "makes it last longer"
You don't acually set the headspace tight, you set it for a marginal head space
so the brass strethes very little during firing
I just setup both my .223 and 30-06 this way.
But if you are using the brass in more than one gun you need to make sure that it will chamber in
every gun you will use it in.
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