What is a 20-223a?

[urbanrifleman]

If you plan to shoot the 40 grainers you'll want at least a 11tw. I shoot Berger 40's in my 20-222 with a Hart 11tw and it stacks them up into one big hole.

So a 10 twist will cover everything then?

 

[B23]

So a 10 twist will cover everything then?

Everything except the Berger 55's

 

[urbanrifleman]

Everything except the Berger 55's

What would you say is the most popular bullet?

 

[B23]

What would you say is the most popular bullet?

Right now I'd say the most popular 20 cal bullet is whatever one you can get your hands on.

Since pretty much all the factory chambered 204 Ruger are 12 twist barrels I'd say the 32-35gr bullets, particularly the 32's, are the most popular. The Berger 35's are very popular among 20 cal coyote shooting crowd. Next in line of popularity would be the 39gr SBK and the different 40's like the Vmax. It takes a specialty built 20 to shoot the 55's so those will be the least popular.

 

[urbanrifleman]

Everything except the Berger 55's

What would you say is the most popular bullet

Right now I'd say the most popular 20 cal bullet is whatever one you can get your hands on.

Since pretty much all the factory chambered 204 Ruger are 12 twist barrels I'd say the 32-35gr bullets, particularly the 32's, are the most popular. The Berger 35's are very popular among 20 cal coyote shooting crowd. Next in line of popularity would be the 39gr SBK and the different 40's like the Vmax. It takes a specialty built 20 to shoot the 55's so those will be the least popular.

Ok, so 12 twist would be the most popular then?

 

[B23]

What would you say is the most popular bullet


Ok, so 12 twist would be the most popular then?

I thought you were asking about most popular bullets, not most popular twist rate.

Since nearly all factory chambered 204's come with a 12tw, a 12tw with regard to factory chambered guns is easily the most popular but they are border line on how well they shoot some of the 40 gr bullets. Some shoot them ok while others do not. When it comes to custom barreled 20's I think the 11tw is probably the most popular choice followed closely by the 10's. Anyone building a 20 to shoot the 55's uses either an 8 or 9 twist.

 

[urbanrifleman]

I thought you were asking about most popular bullets, not most popular twist rate.

Since nearly all factory chambered 204's come with a 12tw, a 12tw with regard to factory chambered guns is easily the most popular but they are border line on how well they shoot some of the 40 gr bullets. Some shoot them ok while others do not. When it comes to custom barreled 20's I think the 11tw is probably the most popular choice followed closely by the 10's. Anyone building a 20 to shoot the 55's uses either an 8 or 9 twist.

I will get the 10 twist then. We do not have an 11 twist.

 

[Greymatter762]

Come on! @urbanrifleman
We need 6x45 prefits!

 

[Tommie]

Here we go again...but it does depend on a couple of things...how big a case is driving the 55 gr Berger 20 cal bullet and the elevation one shoots at. I have a 20-22/250 that drives the 55 gr Berger at 3840fps with a 10-twist Kreiger. I've never shot it below 4500' elevation and most the time above 6,000' elevation. It has over 400 rds through it, and has killed a handfull of PD's over 1000 yds. Best was a three shot kill a 1135 yds. It's best at 700-800 yds because the 55 gr Berger does not open up well beyond that distance. I have switched from RL15 to H-4350. Picture is one of the first groups after I had just put it together. 7315br

Do you think those 55’s would open up more with a faster twist?

 

[sstkmkrr]

Bradley

I have a new 20-223 AI PTG Finish Reamer Floating Pilot Reamer. NK:.0.227 FB: .035

Steve M.
sstkmkrr

 

[platapus]

And does what better than the 204, other than fire forming and wasting barrel life and bullets?

Just askin'

Several things IMO. I am a huge fan of the .20 cal.

I've built a few .204s over the years and the two negatives for me with this cartridge is brass quality and OAL in a AR platform. Go ahead and try to run 40gr @4000fps with Hornady brass, bet you don't get more than one reload before the primer pocket is toast.

The .20-223 Improved is way more efficient and better brass. I run LC in my AR's and Lapua in my bolt gun. Once fire formed, you will never have to trim your brass.

I run 39gr/40gr bullets anywhere from 3735fps to 3850fps, and no I do not have pressure. I do load develop over a chronograph looking for the lowest SD/ES.

If you do not handload, go with the .204. If you handhold, the. 20-223 Improved is a great choice with long brass and barrel life.

Oh, amd one other thing about the misconception of a °40 shoulder not cycling, complete BS.

Picture is a .17-223Imp, .20-223Imp, and .223.

 

[urbanrifleman]

Several things IMO. I am a huge fan of the .20 cal.

I've built a few .204s over the years and the two negatives for me with this cartridge is brass quality and OAL in a AR platform. Go ahead and try to run 40gr @4000fps with Hornady brass, bet you don't get more than one reload before the primer pocket is toast.

The .20-223 Improved is way more efficient and better brass. I run LC in my AR's and Lapua in my bolt gun. Once fire formed, you will never have to trim your brass.

I run 39gr/40gr bullets anywhere from 3735fps to 3850fps, and no I do not have pressure. I do load develop over a chronograph looking for the lowest SD/ES.

If you do not handload, go with the .204. If you handhold, the. 20-223 Improved is a great choice with long brass and barrel life.

Oh, amd one other thing about the misconception of a °40 shoulder not cycling, complete BS.

Picture is a .17-223Imp, .20-223Imp, and .223.

There it is... EXACTLY what I was thinking. You do not have to shoot it faster. Adding the 40 degree shoulder is just a no brainer if you shoot the thing like it is the parent cartridge. It completely stops case growth and gives more headroom which will save the brass primer pockets.

Did you order your own reamer?

 

[platapus]

There it is... EXACTLY what I was thinking. You do not have to shoot it faster. Adding the 40 degree shoulder is just a no brainer if you shoot the thing like it is the parent cartridge. It completely stops case growth and gives more headroom which will save the brass primer pockets.

Did you order your own reamer?

Yes, I have my own reamer for the .20-223 Improved.

When my .17-223Imp is shot out I will send a cartridge off to have a reamer spec'd out. I run a 30gr Chan Nagel at 4000fps

These sub calibers are very addictive and kill impressive.

 

[urbanrifleman]

Yes, I have my own reamer for the .20-223 Improved.

When my .17-223Imp is shot out I will send a cartridge off to have a reamer spec'd out. I run a 30gr Chan Nagel at 4000fps

These sub calibers are very addictive and kill impressive.

Can you send me the print?

 

[platapus]

Can you send me the print?

Sent

 

[urbanrifleman]

Sent

Thank you that is perfect!

 

[urbanrifleman]

The 20-223 reamer shown in the Accurate Shooter article shows a zero freebore.

Would this be the best freebore for 40 and under bullet weights?

 

[B23]

The 20-223 reamer shown in the Accurate Shooter article shows a zero freebore.

Would this be the best freebore for 40 and under bullet weights?

Not like you're going to be shooting factory ammo that has a real short OAL so I don't know why a little bit of freebore would hurt anything. Kevin Weaver builds a lot of small bore rifles and many of his reamers have 15-30 thou FB. I guess you could go zero FB on the chamber reamer then go back in with a throating reamer and put whatever custom FB the customer desired.

 

[urbanrifleman]

Not like you're going to be shooting factory ammo that has a real short OAL so I don't know why a little bit of freebore would hurt anything. Kevin Weaver builds a lot of small bore rifles and many of his reamers have 15-30 thou FB. I guess you could go zero FB on the chamber reamer then go back in with a throating reamer and put whatever custom FB the customer desired.

The Kevin Weaver reamer print shows zero freebore.

 

[B23]

The Kevin Weaver reamer print shows zero freebore.

I'd be very surprised if Kevin doesn't go back in and put some FB in it. A lot of smiths use zero FB reamers but then custom throat the FB length.