Originally Posted by
Obscenejesster
Yea, Rainier and WOA make some good barrels. If you aren't going to shoot 556 then you can just go with a 223 chamber.
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Gotta chime in here - going with a 223 Remington chamber in an AR is ridiculous. Practically speaking, a 223 Remington chamber and more precisely, the throat is for all intents and puposes useless in an AR - much less a precision AR. The throat on a 223 Rem was designed to digest light bullets - 40-50 gr type. It uses an extremely short freebore and has a leade angle of nearly three times a 556 anything. If you want to build an AR with a 1/12 or 1/14 twist and shoot 50gr FBHP - then by all means go with a .223 Rem. If you want precision, with better bullets at distances that are actually meaningful- then use any one of a myriad of custom 556 chambers.
If you want specifics - let my know and I'll pull my chamber prints on a 1/2 dozen different 556 & 223 Rem reamers that I own.
The 223 Wylde isn't in nearly any way a 223 Rem. Bill Wylde started the development of that chamber by using the 223 Rem as the base - it is completely different than a 223 Rem. The Wylde actually has a longer throat than a 556 NATO and is known for it's ability to digest a wide range of bullets - accurately and reliably. There are many others too....
From another post in a different thread – I had submitted the following and it is appropriate here:
“there is a plethora of 223 / 556 reamers that have been "re-engineered". 556 Trophy - specifically dimensioned for shooting mag length 69/77gr match ammo for across the course (200-600yds) matches.
Another is the 556 Target - specific to optimal length match ammo utilizing 80gr Sierra's.
Still another is the 556 LR - set up for the 90gr VLD's for 1000yd use.
All share the tightest free bore that can safely / reliably run ~ .2240-.2242". The first two use 1 deg 30 min leads while the LR uses a 1 deg 10 min lead (matched to the VLD design secant type ogive.)
The Wylde chamber is a great chamber - it is a do it all type and one can expect very good accuracy with a huge range of bullets. Bill Wylde was a pioneer in the development of the 223 as a viable competition / long range cartridge. His chamber generally runs a little loose in the neck - even more so than a 556 NATO. Numbers wise the neck dia at the mouth are .254 for a 223 Rem & the 556 NATO. The Wylde runs .2558". The neck dia at the shoulder is .255 for both the Rem & NATO, while Wylde's runs .2568"
The Wylde has a tight free bore just like the Remy.
One very big difference is the free bore lengths - the Remy run .025", the NATO is .0566 and Wyldes is .0619 - longer that the 556 NATO - and one of the reasons it handles pressure as well as 80gr projectiles.
There are many other minor differences as well - specifically in case body diameters. Unfortunately, some companies still chamber in 223 Rem. I have Rem 700 SPS in 223 and it has a SAAMI spec 223 Rem chamber - it is SHORT!! I only shoot 50-52gr pills out of it and it is very sensitive to seating depth."
I'll also add, that if a prospective builer of a precision AR plans on using a custom / match grade bbl, then by all means get a match chamber to compliment the barrels inherent accuracy.
opsoff
"I'd rather go down the river with seven studs than with a hundred shitheads"- Colonel Charlie Beckwith
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