Wish I would have known...UPDATED AND FIXED!!

[Flash]

Talking with some of the guys from the army AMU unit advised me to use small base dies which they found that it makes for a more accurate round and also will fit all chambers. So ask them how does it be a more accurate? IT makes the case more concentric, the bullet starts out straight in the bore. They also said that it will help with occasional flyer.

I'd love to hear their logic in claiming that small base makes the case more concentric as I see no way that's a possible side effect of SB dies. Nor do I see how it makes the bullet start out straight in the bore.

Small base merely size the base of the case a couple of thousands smaller than standard FL dies, thus the name small base. Some claim it also sets the shoulder back a thousandth or two more, but that's easy enough to do with all FL dies.

 

[cjr]

Talking with some of the guys from the army AMU unit advised me to use small base dies which they found that it makes for a more accurate round and also will fit all chambers. So ask them how does it be a more accurate? IT makes the case more concentric, the bullet starts out straight in the bore. They also said that it will help with occasional flyer.

I'd love to hear their logic in claiming that small base makes the case more concentric as I see no way that's a possible side effect of SB dies. Nor do I see how it makes the bullet start out straight in the bore.

Small base merely size the base of the case a couple of thousands smaller than standard FL dies, thus the name small base. Some claim it also sets the shoulder back a thousandth or two more, but that's easy enough to do with all FL dies.

The only thing I can say is the army has more time and personnel for trail and error. Myself I have benefitted by eliminating occasional flyers.

 

[300mag]

If l'm not mistaken l have read that dillon 308-223 dies are small base full length dies

 

[Flash]

Talking with some of the guys from the army AMU unit advised me to use small base dies which they found that it makes for a more accurate round and also will fit all chambers. So ask them how does it be a more accurate? IT makes the case more concentric, the bullet starts out straight in the bore. They also said that it will help with occasional flyer.

I'd love to hear their logic in claiming that small base makes the case more concentric as I see no way that's a possible side effect of SB dies. Nor do I see how it makes the bullet start out straight in the bore.

Small base merely size the base of the case a couple of thousands smaller than standard FL dies, thus the name small base. Some claim it also sets the shoulder back a thousandth or two more, but that's easy enough to do with all FL dies.

The only thing I can say is the army has more time and personnel for trail and error. Myself I have benefitted by eliminating occasional flyers.

Okay. I also fail to see how sizing the base slightly smaller could possibly eliminate occasional flyers.

In other words, I don't take things on faith, I want to see some science or at the very least, some solid logic.

But that's just me.

 

[TheAccountant]

This thread is the reason I don’t like shooting next to people at public ranges.

 

[brian10x]

"Bras went into the scrap pile"

Well that makes an interesting visual.

 

[792mauser]

 

[xerts1191]

https://www.accurateshooter.com/cartridge-guides/223rem/
Here’s some more info. that may help or hinder?

 

[Flash]

https://www.accurateshooter.com/cartridge-guides/223rem/
Here’s some more info. that may help or hinder?

It does neither, but it's outstanding information. Everything you ever wanted to know about the .223 up to and including Ackley's wildcat of it, the AI.

 

[getsum]

Update: Just got a case gauge today and tested a reload, matter of fact I tested several and they all passed, image 1. Then I conducted a Plunk Test...all failed miserably much like cjr had stated...image 2. The rifle barrel is a 5.56mm chamber.

Next step is to yank the projo, resize brass in SB die, and retest.

Will certainly post results

 

[Jack Dupp]

That cartridge sitting in the barrel chamber actually looks pretty good to me. It's not going to sit flush like with the case gauge.

 

[getsum]

Nope...bolt won't fully close and I have to beat the stock on the floor to eject the round. But I have a plan from here.

 

[Remow2112]

You will be fine once you start using the case gauge. You really don't need SB die. Just resize a case and drop it in the case gauge. Once it is flush (or I prefer just a hair under the edge of the case gauge) you will be golden. I have about 1000 rounds I loaded before my case gauge and they work fine in my generic mil spec upper. But when I got a Ruger MPR with a tighter chamber, none of them will work.

Also, you may be turning down the die even after you hit the shell plate. Don't worry about it. Most likely it will require less then one full turn of the die and it will not hurt anything.

HTH.

 

[TheAccountant]

Update: Just got a case gauge today and tested a reload, matter of fact I tested several and they all passed, image 1. Then I conducted a Plunk Test...all failed miserably much like cjr had stated...image 2. The rifle barrel is a 5.56mm chamber.

Next step is to yank the projo, resize brass in SB die, and retest.

Will certainly post results

I’ll ask again... have you taken the time to figure out what part of the cartridge is causing the issue? All it takes is a sharpie.

 

[getsum]

I've been reloading for over 40yrs but this was a new experience for me and with the help of a friend the solution has been found.

From now on I will only use JP case gauges...what fit fine in the Lyman did not fit in the JP. We took the loaded rounds apart. Resized the case in the SB die, dropped it in the JP case gauge and it was perfect. Reassembled the round, double checked in the case gauge and conducted the Plunk test in my rifle...perfect again.

If something different works for you...that's great. But this is what worked for me and I'm a firm believer in this process when it comes to reloading for my AR's.

A huge thanks to cjr...his remedy was the cure.