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Old 01-06-2013, 08:43 PM   #1
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Default Need Your Thoughts

Went shooting today to kill some time with the 338 Lapua.

Love the gun and got and impressed myself holding within a few inches at 800 yards. I had several misfires though.

Using Winchester Magnum primers and 87.4 gr MagPro powder. Not sure if it's a reloading issue or a firing pin issue.

The case on the left was a fired
The middle one misfired
The one of the right fired on the second try

Any ideas???







First time out to 800 yards



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Old 01-06-2013, 08:50 PM   #2
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That looks like a light strike. Check your firing pin and bolt. Light strikes can be caused by a number of things like a weak spring, dirt, bent firing pin etc. could also be some very hard primers but I would check the mechanics first.



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Old 01-07-2013, 12:25 AM   #3
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Thank you sir

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Old 01-07-2013, 12:40 AM   #4
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I agree,looks like a lite primer strick on the middle round.
Winchester primers aren't too hard,and I mainly use Winchester primers for all my ammo.
I'd check the firing pin and spring to start with,you could also just prime a few cases-just the primer,no powder or bullets,and see if you continue to have this problem. That will narrow you trouble shooting down pretty quick. If you have or can get a couple different brands of Magnum primers,that will also tell you if it is a primer mfg problem.

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Old 01-07-2013, 01:28 AM   #5
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My first thought was a bad lot of primers.

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Old 01-07-2013, 01:29 PM   #6
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Head space can be an issue as well. Excessive headspace can cause light indent misfires. If the shoulder was bumped back a bit too much that might cause this. Judging by the level of accuracy you are getting, I am betting against this. More possible a bad batch of primers.

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Old 01-08-2013, 12:03 AM   #7
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How are you storing your primers before they are used? I use small rifle for 223 and leave the hand priming tool in a ziplock bag while not used. I have not had any problems as long as the primers are stored well.

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Old 01-08-2013, 12:11 AM   #8
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Thanks for the ideas all.
It's only had about 50 rounds through it so it should be covered by warranty. I put about 15 though it the first time and had zero misfires. I did about another 10 or so so check loads and got three shots nearly touching at 300 yards so I stopped. Still no misfires.
I absolutely hate the accutrigger set up so while my wife and kids were at her sisters just before new years I stretched out on the living room floor and "practiced" trigger pull on the living-room floor but I had two of these to run through it. http://www.midwayusa.com/product/178317/harbour-arms-snap-cap-338-lapua-magnum-aluminum-package-of-2 so it's not been "dry fired" per-say. Now it has the misfire issues.
Any chance that helps narrow down the possibilities?

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Old 01-08-2013, 12:41 AM   #9
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Have you fired factory ammo thru it with good strikes? Pictures of factory ammo compared to reloads.

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Old 01-08-2013, 12:58 AM   #10
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100% reloads. I was using some primers at first that were not magnums and had some issues with the timing of the boom. But they did all go boom. Changed and had no issues until after I did the firing with the spring loaded rounds. Not sure what the result is from dry firing. Maybe something with the spring loaded rounds. I dunno.



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