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  #1  
Old 11-19-2018, 11:47 PM
creeks creeks is offline
 
Join Date: Aug 2013
Posts: 146
Default Ethiopian 30-06 Out of Spec ?

I fired some rounds of the Ethiopian today in a 03A3. Rounds had the normal power and were accurate out to 800yds. However, closing the bolt on the rounds was stiff. I put some of my LC M2 in the 03A3 and bolt closes nice and smooth. I put the Ethiopian in a commercial 30-06 bolt gun I have and the bolt would not close. I think the problem is the shoulders are not set back far enough. I haven't checked yet to see if these Ethiopian rounds are also tight in my M1.

Last edited by creeks; 11-19-2018 at 11:50 PM.
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  #2  
Old 11-20-2018, 12:08 AM
BRMPCF50 BRMPCF50 is offline
 
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Location: Central MO
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When I chronographed the Ethiopian 30-06 awhile ago they fed through my M1 just fine. Before firing I checked them with a Sheridan gauge. Link to those pictures...

http://i.imgur.com/ORNiiv1.jpg

http://imgur.com/7hJgnDj

And with the RCBS Precision mic...

http://imgur.com/KUjVmfb
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  #3  
Old 11-20-2018, 12:26 AM
creeks creeks is offline
 
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I have those gauges for .223 and .308 not 30-06. The stiff bolt closing is acting just the way when you don't resize your brass correctly.

Last edited by creeks; 11-20-2018 at 12:32 AM.
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  #4  
Old 11-20-2018, 12:46 AM
BRMPCF50 BRMPCF50 is offline
 
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Some 200+ posts on this thread cover the Ethiopian 30-06. Most using it in bolt guns said it chambered hard. Feed ok in Garands. Is probably on the long, or max side of specification.

http://forums.thecmp.org/showthread....231407&page=22

It fit the Sheridan gauge. The Precision Mic showed them at 8-10 thousandths longer than minimum.
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  #5  
Old 11-20-2018, 10:14 AM
ceresco ceresco is offline
 
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You need to check RCBS Precision Case Gauges with headspace gauges.....they can be adjusted and many are off enough to make this necessary. A quick fix is to put a piece of tape on the gauge and mark the "zero". If a RCBS gauge is calling 30-06 cases 10 thousandths "long" I suspect the gauge is off. Cases that are actually that long will not chamber in most 30-06s. Good Shooting. ...
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  #6  
Old 11-20-2018, 04:54 PM
grumpa72 grumpa72 is offline
 
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Location: Moon Township, PA
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Quote:
Originally Posted by BRMPCF50 View Post
Some 200+ posts on this thread cover the Ethiopian 30-06. Most using it in bolt guns said it chambered hard. Feed ok in Garands...
And that is exactly what I have found.
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  #7  
Old 11-20-2018, 05:12 PM
Jeremy2171 Jeremy2171 is offline
 
Join Date: Feb 2010
Location: NC
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Quote:
Originally Posted by ceresco View Post
You need to check RCBS Precision Case Gauges with headspace gauges.....they can be adjusted and many are off enough to make this necessary. A quick fix is to put a piece of tape on the gauge and mark the "zero". If a RCBS gauge is calling 30-06 cases 10 thousandths "long" I suspect the gauge is off. Cases that are actually that long will not chamber in most 30-06s. Good Shooting. ...
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  #8  
Old 11-28-2018, 03:37 PM
BRMPCF50 BRMPCF50 is offline
 
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The RCBS Precision Mic is zeroed on a Forster Go gauge. I measured 16 Ethiopian cartridges. The pictured was the "longest," most measured in the 7-8 range. I gingerly turn the gauge to just "kiss" the shoulder when measuring.

The unfired cartridges dropped into the Sheridan and Wilson case gauges, again closer to maximum length in both gauges.

Five new S&Bs that I checked with the RCBS mic at the same time were zero or less.

Fired Ethiopian cases drop into the Wilson gauge and measure at max length. Fired cases will not go all they way into the Sheridan gauge.
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  #9  
Old 11-28-2018, 03:52 PM
ceresco ceresco is offline
 
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Your gauge should read zero with the "go", +.006 with the "no go" and +.010 with the field. I use a bit more force in closing the gauge and try to be very consistent. Fired cases are generally around +.005-6 and +.007-8 with cause problems in many rifles. You also need to look at case diameters when cases chamber with difficulty. A general rule is: cases that won't extract easily have excessive diameters. Excessive cartridge headspace rarely prevents easy extraction. Good Shooting. ...
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