Might have bumped the shoulder too far?

With the m855 I had reading shorter than that would you attribute that to the m855 actually being shorter than that or the hornady gage being off that far

Edit. You posted before me that answered the question.
 
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My Hornady 'A' gauge measure of my unfired brass at
Code: 
Lapua 223            1.454
PMC 223              1.456
Win 5.56             1.454
REM 223              1.456
FED M193/5.56        1.454
BlkHills(Remanf) 223 1.452

So it varies a bit, and "measures" (comparatively) smaller that SAMMI Min.
But I don't care. All I care about is that I know what it should read when resizing to fit my Krieger chamber: 1.460"
 
Do your 1.459 cases chamber easily in your rifle ?

Remember all factory ammo is likely going to be closer to the minimum then the maximum . When reloading we generally want are cases closer to the maximum length . When I say maximum length I mean maximum in comparison to your chamber . This helps extend the life of your brass .

The XM855 should have plenty of pressure to blow your cases out . I'm starting to come around to the thinking as others have said . That is that your chamber may be a little on the fatter side .

I believe others have touched on this but I'll mention it again . If your 1.459 cases chamber when lightly clambering them with the FA . They should be fine and would also say the XM855 rounds are sized much closer to minimum spec . Why there not being blown out to your chamber size is the new question . At least for me it is . There are a few reasons why that could be happening but not sure if it really matters for you though . It's just one of those , hmm things that I like to understand .
 
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Could it have anything to do with being a .223 wylde chamber?

The .223 Wylde is a proprietary rifle cartridge chamber with the external dimensions and lead angle as found in the military 5.56×45mm NATO cartridge and the 0.2240 inch freebore diameter as found in the civilian SAAMI .223 Remington cartridge.
Click to expand...

Yea they all easily chamber.
 
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Mehavey I think that may be the answer. Doing it that way is going to give me the same result I would get with any other tool even if they all call that same end result by a different number.

I still want to get both the wilson gage, and the rcbs mic. I figure they will give me peace of mind at least. If I use all 3 and note the measurements, anytime I worry something is off with one of them I can verify with the others. Yes I have adhd real bad lol
 
Then there is the chamber, measuring the chamber; a chamber cast is one of those topics that can not be discussed in a reloading forum. Reloaders do not know how and they do not want anyone to know. A chamber can be measured for length from the shoulder to the bolt face at least three different ways. Reloaders with an infatuation with head space gages us the go, no and beyond gage and that is it. I want to know the length of the chamber from the shoulder to the bolt face when it is measured in thousandths.

One more time, I have an Eddystone M1917, the chamber is .002” longer than a field reject gage, or..016” longer than a minimum length/full length sized case, or .011” longer than a go-gage length chamber. None of this drives me to the curb or locks me up. When sizing/forming cases for that chamber I adjust the sizing die off the shell holder .014” with a feeler gage then size/neck-up 280 Remington cases to 30/06.

Bump the shoulder? The shoulder on the 280 Remington case does not move.

F. Guffey
 
The Outlaw, leave your die set to the longest case setting, all your measurements I'm sure are correct, the brass just isn't stretching, l shoot benchrest only, I size my brass to .001 headspace. 308 cal. Bolt action 1.629 if some case reading are 1.627 or below I don't use for target shooting. Doesn't mean they wouldn't fire, may only get 6 reloads instead of 25
 
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