.223 Remington Chambers (ISSF, Wylde etc.)

[Krogen]

Can you good folks enlighten me about chamber configurations for the .223 Remington? I understand that Wylde is a hybrid of .223 Remington and 5.56x45. Not as "sloppy" as a 5.56 but still safe for 5.56 or .223. What are the ISSF or match chamberings? How do they compare to stock-standard .223 Remington? Currently I shoot Berger 80.5 gr Fullbore and I'm starting tests with Berger 80 gr VLD. I may try out the Berger 90 gr VLD.

I'm looking to re-barrel my Savage F T/R and would appreciate insight and advice from the group.

TIA,

--Krogen

 

[urbanrifleman]

It's more about freebore than anything. I would suggest staying above the donut is more important than all those little concerns about chamber differences.

 

[Krogen]

Thank you! What is "the donut?"

 

[urbanrifleman]

Thank you! What is "the donut?"

When you resize a case over and over and over again the brass in the neck is pushed downward and eventually forms a funnel shape and there's a tightening at the point where the neck meets the shoulder. And this is called a donut. I personally believe that most of the problems that people have reloading are actually donut related. People complain that they're barrels start shooting erratically at about 600 to 800 rounds thinking that they're barrel is burnt out but actually their new brass that they bought when they bought their barrel is now old brass and has several resizings on it and has a donut. And they are reloading into the donut and the things start shooting crazy.

 

[Walt Krafft]

There are lots of different 223 chambers. Most of the differences are going to be in the neck and throat diameters, freebore length, and lead angle. The 80.5 works very well in the Wylde chamber. If you want to shoot a heavier bullet, you will need a longer throat so you don't have to seat the bullet past the neck to shoulder junction of the case. This area can form a tight spot called a donut. A longer throat also gives room for more powder. The downside to a long throat is short bullets will have to make a jump to reach the rifling. Many bullets do not shoot accurately when they have to make this jump.

 

[urbanrifleman]

There are lots of different 223 chambers. Most of the differences are going to be in the neck and throat diameters, freebore length, and lead angle. The 80.5 works very well in the Wylde chamber. If you want to shoot a heavier bullet, you will need a longer throat so you don't have to seat the bullet past the neck to shoulder junction of the case. This area can form a tight spot called a donut. A longer throat also gives room for more powder. The downside to a long throat is short bullets will have to make a jump to reach the rifling. Many bullets do not shoot accurately when they have to make this jump.

I suggested the issf 223 .169 fb for the 80s. I think that is pretty much ideal.

 

[urbanrifleman]

Here's a photo of a factory Black Hills 77 grain .223 cartridge, a .223 loaded with a 77 grain Berger OTM bulllet to just touch the lands in the Urbanrifleman ISSF chamber, and two Berger OTM bullets next to the cartridges.

View attachment 1446029

Absolutely perfect freebore.

Thanks bro.

 

[Pawnee Bill]

You can create your own specific chamber spec and name the chamber after yourself, ie the 223 Rem Fred chamber.

 

[urbanrifleman]

You can create your own specific chamber spec and name the chamber after yourself, ie the 223 Rem Fred chamber.

It says on my reamer prints my 223 230 fb Walker

 

[Krogen]

Thanks for the help, guys! I'm sending an order off to Urbanrifleman.

 

[urbanrifleman]

Thanks for the help, guys! I'm sending an order off to Urbanrifleman.

You only need an 8 twist unless you want to go above 85.

 

[Big_Daddy]

Thanks for the help, guys! I'm sending an order off to Urbanrifleman.

Excellent...I will take the credit for this sale!!!

 

[Krogen]

The backstory: Big_Daddy is a good friend. He speaks highly of Urbanrifleman's barrels. Even better, I've seen him shoot them. Clearly, they work well. We'll be shooting again on the 500 day after tomorrow.

 

[urbanrifleman]

The backstory: Big_Daddy is a good friend. He speaks highly of Urbanrifleman's barrels. Even better, I've seen him shoot them. Clearly, they work well. We'll be shooting again on the 500 day after tomorrow.

He is certainly a great customer!