Creedmoor Hawkeye Predator's First Range Day

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Dranrab

Single-Sixer
Joined
Jul 24, 2015
Messages
138
42.5 grains of IMR 4350 driving a Hornady 129gr SST, COAL 2.795 gave me this 3 shot group at 100 yards. By my imprecise measurement it's .35 center to center. Two literally went through the same hole. I think I have a shooter and a load. I need to adjust my scope a bit. Still getting everything set up.

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The factory loads gave me sticky extraction. How do you read these empties.

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wwb

Hunter
Joined
Nov 18, 2004
Messages
2,796
Location
wisconsin
Primers are definitely flattened a bit; also a little cold flow around the firing pin indent. I've seen FAR worse.

Sticky extraction might be a chamber finish issue - the fired brass doesn't look bad enough to cause it.
 

6GUNSONLY

Hunter
Joined
Nov 30, 2004
Messages
2,797
Location
Alabama, in the bend of the Tennessee River
wwb said:
Primers are definitely flattened a bit; also a little cold flow around the firing pin indent. I've seen FAR worse.

Sticky extraction might be a chamber finish issue - the fired brass doesn't look bad enough to cause it.

Agree with this. I might do a little gentle polishing on that chamber. I had to do this on my Remington R-25 .308 recently and it seems to have solved the problem. Semiautos are different, I know, but it sure couldn't hurt anything. My extraction was so "sticky" it was tearing the rims off cases...
Ken
 
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