Difficult extraction

[Ben B.]

I had to add a small base due for my AR rounds. I tried to avoid it and spent hours dicking around adjusting the full length Hornady die. Eventually I caved, and had the RCBS small base die in station 4, after the deprime, size, and trim stations That was many years ago and it's been trouble free ever since in all my ARs.

 

[gmerkt]

What kind of bullet is being used?

I didn't see any comment from the OP about trimming, although the question was asked.

 

[drstrangelove]

What kind of bullet is being used?

I didn't see any comment from the OP about trimming, although the question was asked.

Great point. Necko Longo, no Chambero.

 

[po18guy]

Military brass, such as LC, is thicker and softer than commercial. Thus, it will produce slightly higher pressures, having less case capacity. As well, it expands more easily upon firing, but does not shrink back like commerical. Military brass is not formulated for reloading.

 

[lav2323]

Well I picked up a

What kind of bullet is being used?

I didn't see any comment from the OP about trimming, although the question was asked.

Yeah all brass was around 1.75. And was using top brass 55gr bt bullet

 

[Cerberus Group]

We trim to 1.50"

Missed a digit....should be 1.750

 

[Koda]

Well I picked up a

Yeah all brass was around 1.75. And was using top brass 55gr bt bullet

Well then theres your problem. Your brass cant go more than 1.760" max.
Probably a pressure safety issue along with extraction...?

 

[lav2323]

Well then theres your problem. Your brass cant go more than 1.760" max.
Probably a pressure safety issue along with extraction...?

 

[Koda]

View attachment 1734277

My bad, my morning no coffee yet brain misread your trim length. I thought it read larger than 1.76.

Back to the drawing board...

 

[lav2323]

Well gents I ended up getting another resizing die. And that seems to have fixed the issue. I'm thinking it was a shoulder issue as most have mentioned earlier. Also I measured the shoulder on those rounds and it was slightly out of spec. Thanks everyone for the replies.

 

[Cerberus Group]

We trim to 1.50"

Oops, missed a digit...

1.750 and nothing less than 1.745

 

[Cerberus Group]

Well gents I ended up getting another resizing die. And that seems to have fixed the issue. I'm thinking it was a shoulder issue as most have mentioned earlier. Also I measured the shoulder on those rounds and it was slightly out of spec. Thanks everyone for the replies.

Do you have a headspace gauge?

 

[lav2323]

Oops, missed a digit...

1.750 and nothing less than 1.745

Haha I was gonna say, man that's short

 

[lav2323]

Do you have a headspace gauge?

Yes I do didn't think to use it, as these were just plinking loads. Didn't spend a lot of time and detail like I do for my hunting loads.

 

[Cerberus Group]

Yes I do didn't think to use it, as these were just plinking loads. Didn't spend a lot of time and detail like I do for my hunting loads.

My recommendation, after making millions of 223/5.56 rounds...is to have both a case gauge which checks headspace, and a chamber gauge which checks the overall dimension of the round

The chamber gauge is a SAMMI spec chamber in a block, and will give instant feedback to the loader if the round is in spec to chamber...will let you know immediately if the size die is adjusted properly, if the neck is sized properly, and case mouth is in proper diameter etc.

 

[ma96782]

Aloha, Mark

 

[lav2323]

My recommendation, after making millions of 223/5.56 rounds...is to have both a case gauge which checks headspace, and a chamber gauge which checks the overall dimension of the round

The chamber gauge is a SAMMI spec chamber in a block, and will give instant feedback to the loader if the round is in spec to chamber...will let you know immediately if the size die is adjusted properly, if the neck is sized properly, and case mouth is in proper diameter etc.

Sound advice appreciate it, I have a case gauge but ordering the chamber gauge as well. Thanks!

 

[Cerberus Group]

Sound advice appreciate it, I have a case gauge but ordering the chamber gauge as well. Thanks!

There's two companies that make top quality chamber checker gauges.

OnPoint is good, but they are hard to get as they make limited runs of their blocks.

Every round we make gets checked by these chamber gauges to ensure they will function...a bit labor intensive, but well worth it.

 

[lav2323]

There's two companies that make top quality chamber checker gauges.

OnPoint is good, but they are hard to get as they make limited runs of their blocks.

Every round we make gets checked by these chamber gauges to ensure they will function...a bit labor intensive, but well worth it.

View attachment 1735046

Awesome! Thanks for the info

 

[PiratePast40]

Appreciate the advice in this thread. I was also wondering if I needed a case gauge or a chamber gauge, but for 300 BO. Will be checking all trimmed and sized cases with a chamber gauge vs case gauge both before priming and after loading.