tp555 300 whisper barrels

[Scalce]

Originally Posted by SwampF0X

I've reloaded other catridges but I've never used a case gage. I just load to the recommended OAL and let it be.

Once I shoot up all my 223's I plan to let someone form my brass to 300 whisper. From there I'll load my own according to info I find on this site.

If tp555 builds my barrel and assembles my upper (and he probably will) Who should I get to form/size my brass so that I won't have any problems?

thanks,
swampf0x

The OAL has nothing to do with how much you are bumping back the shoulder.

While most standard rifle case gauges can be used to check the OAL of a case, the main use is to make sure you have the proper amount of body and shoulder sizing to allow the case to chamber in a SAAMI spec rifle chamber. The gauge also allows you to not overwork your brass by bumping the shoulder back too much which potentially shortens the case life.

Even if you have someone initially form your brass, you will still need to full length size your brass for a semi auto or at least neck size for a bolt gun. You may also have to occassionally full length size for a bolt gun if the case gets hard to chamber and extract after a few firings.

I would say that you should have tp555 make you a chamber gauge along with your barrel.

This will allow you to send it to whomever forms your brass so there will be little chance of the brass not being sized correctly.

You will also have the gauge for your own use when resizing the fired brass.

Ask tp555 but I bet he will advise you to form only commercial 223 brass and to shy away from milsurp as it may have chambering issues because of a more rounded shoulder during initial forming.

I hope you don't think my posts are meant to insult you as I am just trying to give you as much info as possible so you can enjoy shooting your rifle.

This catridge is still technically a wildcat and there are many variables such as gunsmiths, chamber reamers, throats, cases, bullets, dies, and more that can be a factor.

I am still learning alot about it myself but I think that is half the fun.