.223 bushing ?

[Gman]

Would someone Please measure the neck "outside diameter" of a loaded .223 round using new Lapua brass with a 69 grain Sierra Match King. I need to order a couple of Wilson bushings & don't have the bullets or brass yet. Thank You !!!

 

[jepp2]

Would someone Please measure the neck "outside diameter" of a loaded .223 round using new Lapua brass with a 69 grain Sierra Match King.

I'm sure you know this, but the loaded neck OD isn't going to be any difference (to speak of) if it is a 69 gr Sierra Match King, or a Berger 80.5 gr bullet. Less than 0.0005" at most.

I load for a Krieger 223 barrel and use current production Lapua brass. My loaded neck OD runs .2490" no matter what bullet I use. My fired neck OD is 0.2505 to 0.2510". And before seating my sized neck OD is 0.2475".

 

[Kracken McGraw]

I concur with Jepp2. This is new Lapua brass with 69 SMK. I’m getting one thousandth neck tension with my standard full length die.

 

[Gman]

Thank You both for this info !!!

 

[Hohn]

I have 500 rounds of loaded Lapua factory ammo and the ones I checked are .250 or .2505 on the neck OD unfired.

In my Criterion, fired cases come out .2545. My Forster is honed at .245 and gives sized necks just under .247 depending on neck hardness.

I honed this die for the thinnest brass I have, which has loaded diameters around .2485.

 

[Ned Ludd]

I would suggest buying several bushings within a likely diameter window. That way, you'll have the correct bushing.

I have run a .223 in F-TR for years and always used a 0.248" bushing with Lapua brass (un-turned necks). A 0.248 bushing gives me between .0015" and .0020" neck tension (interference fit), whereas a 0.249" bushing would be at .001" or under. Even subtle differences in technique, setup, and measuring equipment can generate variance of half a thousandth to one thousandth in these measurements, so there is no way to be sure exactly what you need based on numbers provided at an internet shooting forum. Consider these numbers a "guide" only; something that will get you to the correct general area. However, you'll still need to determine actual measurements and the proper bushing size needed for your specific setup.

I would therefore recommend getting yourself a set of something like 0.249", 0.248", 0.247", and maybe even 0.246" steel bushings. They're relatively inexpensive and once you have determined the best bushing size for your setup, you can always go back and buy just a single bushing of that size in the more costly titanium nitride if you wish. FWIW - I ended up using the smaller bushings that I initially bought but did not use loading for an AR with a different and less expensive brand of brass (i.e. slightly thinner neck walls), so purchasing the extra sizes was not "wasted" money.

 

[teele1]

I would suggest buying several bushings within a likely diameter window. That way, you'll have the correct bushing.

I have run a .223 in F-TR for years and always used a 0.248" bushing with Lapua brass (un-turned necks). A 0.248 bushing gives me between .0015" and .0020" neck tension (interference fit), whereas a 0.249" bushing would be at .001" or under. Even subtle differences in technique, setup, and measuring equipment can generate variance of half a thousandth to one thousandth in these measurements, so there is no way to be sure exactly what you need based on numbers provided at an internet shooting forum. Consider these numbers a "guide" only; something that will get you to the correct general area. However, you'll still need to determine actual measurements and the proper bushing size needed for your specific setup.

I would therefore recommend getting yourself a set of something like 0.249", 0.248", 0.247", and maybe even 0.246" steel bushings. They're relatively inexpensive and once you have determined the best bushing size for your setup, you can always go back and buy just a single bushing of that size in the more costly titanium nitride if you wish. FWIW - I ended up using the smaller bushings that I initially bought but did not use loading for an AR with a different and less expensive brand of brass (i.e. slightly thinner neck walls), so purchasing the extra sizes was not "wasted" money.

Plus most calipers are only accurate to plus or minus .001 anyway

 

[joe139]

With a starret mic mine measure .250 and I use a 248 bushing. Unturned neck.