Shrinkmd
Member
I was using my new micrometer to measure the case necks on my 223 factory ammo which I plan on reloading. I have some Winchester which runs .249 on average, and some PPU which was less consistent and seemed a bit larger, more around .249-250. I was trying to measure the middle of the neck, and only enough tension to pick up the cartridge, but not mashing the micrometer until it doesn't turn anymore. Does this sound like the correct technique? Should I be turning each cartridge and averaging multiple measurents?
According to the Redding directions, I should choose a bushing 0.001 smaller than the smallest case. That would yield a 247 or 248.
Does this sound correct? I am likely using mostly fmjbt bullets, which I have read can act as their own expander if the fit is close enough.
For now these will be shot through a standard 20" bushmaster target model, but at some point I want to get a nice bolt gun. So I'm trying to learn techniques and use the tools which may bring more accuracy and better brass life later.
According to the Redding directions, I should choose a bushing 0.001 smaller than the smallest case. That would yield a 247 or 248.
Does this sound correct? I am likely using mostly fmjbt bullets, which I have read can act as their own expander if the fit is close enough.
For now these will be shot through a standard 20" bushmaster target model, but at some point I want to get a nice bolt gun. So I'm trying to learn techniques and use the tools which may bring more accuracy and better brass life later.