My belted .30 Carbine case

Interesting, he asked which brass I was using. I said Starline and he replied: "Starline produces hefty, stocky brass. They like real sturdy cases."
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They like sturdy cases? So they add to the thickness of the case on the outside or they add to the thickness of the case on the inside? I suggest a reloader learn to measure before and again after. And then there is that thing about measuring case head thickness, I have 30/06 brass that is .200" thick from the cup above the web to the case head and I have 30/06 cases with a case head thickness of .260" from the cup above the web to the case head.

I am the only reloader that does not size anymore of the case than is necessary.

F. Guffey
 
Just so you know, it is beyond doubt your carbide die. You can compensate by backing the die off so that you only size about halfway, and it should still chamber properly in your contender.

You can shoot them as is, and since the contender will still fit the chamber on the "belt" you shouldn't lose accuracy or even have any problems.
 
briandg said:
Just so you know, it is beyond doubt your carbide die. You can compensate by backing the die off so that you only size about halfway, and it should still chamber properly in your contender.

You can shoot them as is, and since the contender will still fit the chamber on the "belt" you shouldn't lose accuracy or even have any problems.
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I agree it would be alright to back out the sizing some. Maybe 1 turn or so, but not half way. I did that and learned my lesson. Thank goodness I didn't need to pay a high tuition for the lesson.

One fired round out of my m1 carbine produced a slightly banana shape brass for reason unknown. Perhaps I stepped on it or it just hit something in the wrong way during ejection. The partial length resizing didn't take out the crook enough. The loaded round stopped half way in the chamber. This is bad combination. The bridge was not stopping the floating firing pin, increasing the chance of slam fire. And it would be out-of-battery. Nicht gut. Luckily it didn't happen. Will never do that again.

-TL



Sent from my SM-G930T using Tapatalk
 
You can shoot them as is, and since the contender will still fit the chamber on the "belt" you shouldn't lose accuracy or even have any problems.
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I would want to know how much case head protrusion first before I could decide if any of this could create a problem.

F. Guffey
 
Update: after 3 weeks I received my replacement Dillon resizing die along with a single case I assume had been resized with the die. So as an experiment I re-resized some of my brass I had already resized using my RCBS die.

Result: most of my cases emerged without issue; most put up some resistance when being re-resized. But some emerged with a slight "belt" at the base in the same location as the previous die did. But nowhere nearly as deep.

Now, all these cases have been fired and resized about 3 times. Fired in a Blackhawk, Universal M1 Carbine, and/or a Kahr reproduction. The only die I've ever used on these cases prior to the Dillon is the RCBS dies.

Interpretation? Why the shallow "belt" on some cases? And not others?
 
Interpretation? Why the shallow "belt" on some cases? And not others?
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I am the one that measures before and again after, I have dies that are mistakes, they are not full length sizing dies, and they are not small base dies; they do have a problem/something wrong with them. They keep ever case that is shoved into them. I have found 5 sets of dies that have the same problem. So when listig my dies I can list dies as full length sizing dies, small base dies and really small base dies.

I measure before and again after, reloaders make exaggerated claims bout small base dies and the amount the SBdie reduce the area of the case above the extractor groove. I find it most difficult to measure the amount of reduction in the diameter of the case diameter when comparing cases that have been sized with a full length sizing dies and cases that have been sized with small base dies.

I know, there has to be two of you are wondering if the dies are in that bad of shape why don't I send them back? The answer? I am waiting for that short chamber that needs a special die for a small diameter chamber, problem? A chamber that has a reduce diameter at the rear of the chamber also has a short chamber from the shoulder to the bolt face.

F. Guffey
 
The next time you fire some 30M1 Carbine from your various firearms, keep some fired cases segregated and identified as to which firearm they were shot in. Measure the outside diameter on the fired cases at the point where the belt appears. It is possible that one chamber is a bit larger than the others. Most likely it is one of the semi-auto rifles, but it could be one or more chambers in the revolver, so save one from each chamber to measure.
The Dillon carbide size die is full length & small base, so be sure to use a quality lube, preferably lanolin based.
 
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