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

[TheAccountant]

Have you stopped to figure out what part of the cartridge is keeping it from going into battery? Those pulls can be deformed enough that they’ll push the neck diameter out of spec enough to cause interference on a tighter chamber.

[300mag]

I have always set up my dies using the hornady headspace bushing comparator after having the same problem with my LR308.

[Bigfoot]

I'm a relative newb to reloading...only a handful of years under my belt. But, 223 was one of the first I started with. Only have full length sizing die from Dillon. Never had that issue. I made sure my cases were correct length and used case gauge/caliper. Have a Giraud Tri-Way trimmer as needed.

[cjr]

Many yrs. ago when I was shooting the AR in competition found out that the rounds did not pass the pluk test no matter how the die was set. 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 have been using SB dies ever since. One draw back is that it will shorten the use of the cartridge.

[Old Jeff H]

I have always set up my dies using the hornady headspace bushing comparator after having the same problem with my LR308.

This is really the way to go. Gives you the ultimate knowledge and control of how much you're setting those shoulders back. The RCBS Precision Mic does as well, but it's much slower to use.

[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/cartrid ... es/223rem/
Here’s some more info. that may help or hinder?

[Flash]

https://www.accurateshooter.com/cartrid ... es/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