• Watch Out for Scammers!

    We've now added a color code for all accounts. Orange accounts are new members, Blue are full members, and Green are Supporters. If you get a message about a sale from an orange account, make sure you pay attention before sending any money!

What bushing do i need?

308skinner

Sergeant
Full Member
Minuteman
  • Sep 23, 2006
    1,005
    14
    41
    Indiana
    Im loading a 223 bolt. I measured what i have loaded now and they range between .246 and .247. Should i get the 245 or 246? Im loading win brass with 60vmax.
     
    Re: What bushing do i need?

    Bolt gun or autoloader?

    I would go with .243 for autoloader and .244 for bolt gun.
     
    Re: What bushing do i need?

    .244 will give you 2 thou neck tension, perfect for a bolt gun.

    This is how it pretty much works

    1 thou neck tension if you are going to single load
    2 thou if you are going to load from a mag (bolt gun!)
    3 thou for autoloaders (such as AR15's)

    you deduct the above number from the measurement you took from a loaded round and that number will give you the size of the bushing.

    However, if you are loading molly bullets for a bolt gun, some people go with 3 thou neck tension because molly is slicker or some shit like that. I dont fuck with molly so not an issue for me.
     
    Re: What bushing do i need?

    No its not molly ill order me a 244 and 245 and try then both. Thanks USMCj.
     
    Re: What bushing do i need?

    .003 under neck diameter to begin .004 after four or five reloads unless you anneal. .001 under you will have bullets falling out of the case......
     
    Re: What bushing do i need?

    <div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: criver</div><div class="ubbcode-body">.003 under neck diameter to begin .004 after four or five reloads unless you anneal. .001 under you will have bullets falling out of the case...... </div></div>

    I have quite a few friends who shoot BR (and BR only) that use bishings .001 under and I havent seen any of their bullets fall out. I go .002 under on mine, and you guessed it, no bullets falling out either! (or pushed in for that matter. And mine are mag fed!
     
    Re: What bushing do i need?

    .001 Neck tension is fine. I run alot of ammo via the mag with .001 neck tension. Never an issue what so ever.

    FWIW, per the Redding instruction sheet I have in front of me-

    To Determine Bushing Size
    The proper bushing size can be determined by measuring the outside neck diameter of your loaded cartridges with a precision micrometer. From this measurement, subtract .001". This allows for a small amount of brass spring back and created a proper press fit for the bullet.