anyone else seen this?.......

[rsrocket1]

Take a Sharpie or Magic marker and color the case and bullet in one of the loaded cartridges that don't pass your case gauge check.

Put it in the case gauge, pull it out and tell us where the ink rubs off.
That will tell you what the symptom is (neck, shoulder, base).

Otherwise "doesn't fit in the case gauge" is not very helpful.

[ar15barrels]

Check the chamber checker for loose powder. 223 is notorious for throwing out powder on a progressive

Grease under the shellplate dramatically reduces powder spillage.
The powder spillage is from the shellplate indexing stop happening too fast.
Some grease under the shellplate as well as adjusting the plate so it's not sloppy loose on the press will slow the shellplate "jump" down enough that you won't get powder spillage.

[downfall]

Thanks for all the suggestions. I am using an RCBS seater die specifically for AR And it applied a crimp while seating. I am guessing the crimp function is what makes it an AR die. To remove the crimping function is a new seating stem required?

[FLIGHT762]

Most all regular seating dis have a crimp function. All you have to do is back off the seating die to add more or less crimp, or back off the die about a full turn to not crimp at all.

How did you set the seating die for the crimp you're getting?

Read the instructions for the seating die. From what I've seen on the net for the AR series dies, they look like regular dies with a taper crimp instead of a roll crimp.

Is this the first time you've reloaded for a bottle necked Rifle cartridge?

We're trying to help, but we are all guessing as to what your issue might be. For a loaded cartridge not to pass a case gauge or actually chambering, the causes can be too long of a case, not bumping the shoulder enough, case web not being sized down enough and applying too heavy of the crimp and distorting the case shoulders. Not bumping the shoulders enough can also be caused by having your decapping pin set way too low and bottoming out the expander button into the bottom of the case, not allowing the die to fully size. It can also bend the decapping rod.

[Tripplet918]

Thanks for all the suggestions. I am using an RCBS seater die specifically for AR And it applied a crimp while seating. I am guessing the crimp function is what makes it an AR die. To remove the crimping function is a new seating stem required?

Nope. You bought a combo seater and crimper which usually means a bit more complexity.

Here is the manual to adjust it.

https://www.rcbs.com/on/demandware.static/-/Library-Sites-HuntShootAccessoriesSharedLibrary/default/dw7be4b2fb/productPdfFiles/rcbsPdf/Reloading_Die_Instructions.pdf

I personally use a Lee crimp die and put the lightest crimp.

[croue]

Combo Crimp/seat dies save a die and a spot on the progressive.
But the brass length needs a bit more consistency than usual to work smoothly in this case.

I run 100% of my 223 brass through the trimmer as I do the same thing. Load 223 on progressive with a combo die that is.


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[downfall]

Croute: what trimmer do you use?

[downfall]

I did some testing after using the instructions to back off the die. I found the issue still occurs, I am beginning to think this may be case neck tension as previously mentioned. I will test that next. Thanks for all the replies.

[croue]

Croute: what trimmer do you use?

I use the ?Worlds Finest Trimmer? by little crow gun works.

I chuck it in my drill press and go to town on a bucketful at a time.

Works great. Fingers do get tired. You have to have a firm grip and don?t ouch it in to abruptly nor to gently. You get the hang of it after a little practice.

C


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[downfall]

Thanks, I am considering the FA case trimmer, kind of spendy but it has multiple functions.

[divingin]

reloaded about 100 rounds of .223 on a progressive press. Previous to starting the brass was processed and dropped into a chamber checker to assure it is in spec. reloaded the brass and ran them all through the chamber checker again. This time, half would only go about 80% into the chamber checker. the half were in spec.???

I am stumped, could bullet seater be causing this?

TIA

Simple method for troubleshooting: Process the brass as you are, but at each step (where possible) remove the brass and check in your gauge. That will tell you at which step your issue is caused.

Once you figure that out, check the reloads in your rifle to see if there actually is a real-world problem. If there is, you now know what's causing it, and can act to remedy that. If there isn't, it's a disconnect between your gauge and your rifles chamber.

Last step: Put the gauge on the shelf and use the rifle chamber to gauge ammo, since that's where the cartridges need to work.

BTW, usually chambering problems caused at the seating station are from overcrimping which causes bulges in the brass below the neck. Unless you have some weird situation that actually needs a crimp, run without crimping at all. Most sizing dies give adequate neck tension (Hi, Guffey!) to hold the bullet.

[ar15barrels]

(Hi, Guffey!)

This has about the same usefulness as small primer 45acp brass.

[BrassCase]

I use the ?Worlds Finest Trimmer? by little crow gun works.

I chuck it in my drill press and go to town on a bucketful at a time.

Works great. Fingers do get tired. You have to have a firm grip and don?t ouch it in to abruptly nor to gently. You get the hang of it after a little practice.

C


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Same here but I have the next gen with inserts that can be popped out to change calibers. These work very well.

[Tommy Gun]

I've said it before but I started with the Forster classic trimmer.

Then found out they had an adapter to use power drills and also sell a tri way trimmer attachment. Pricey st $70 a caliber but it trims and inside outside chamfurs. Blades are adjustable as well if you don't like the factory settings. Done me well especially trimming a thousand cases.

[croue]

Same here but I have the next gen with inserts that can be popped out to change calibers. These work very well.

Didn?t know they had a new generation. That sounds like a nice upgrade.
C


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