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Primer/Ignition question?

 
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  #8  
Old 12-05-2006, 09:55 PM
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Re: Primer/Ignition question?

[ QUOTE ]
The rifle is basically a factory stock 700 Sendero. I've glass bedded it, added an aftermarket trigger and tuned it down to about 1/2lb. Questions, thoughts, comments?

[/ QUOTE ]

I would look towards the bedding shifting as you shoot. I had the same problem with my .22-250. The first two or three shots in the .3s then its anyone's guess. The problem was the barreled action was only contacting opposite corners of the bedding block. Some careful stock work by my Uncle, and it would keep 10 shots in the .5s for me. The scenario you gave leads me to blame the bedding. Can't hurt to take a peek and see if you can see wear points on either the bedding job or spots where the blue or finish is wearing uneven on the barrel/action.
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  #9  
Old 12-06-2006, 12:15 AM
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Re: Primer/Ignition question?

Hi i would also check the bedding what did you use? did you have any stress on the action while it was drying. If you dont leave it at least a week without touching it with a large magnum it can give you problems. When bedding onto an alloy block i use my Dremel tool with a sanding drum to fough up the area where the bedding is to go, then i enlarge the cutout for the recoil lug in front and behind to allow for at least 1/8" bedding thickness everywhere. then i place a small drill bit into the dremel and drill 1/4" holes all over the bedding area at diferent angles so when the beding compound is placed onto the stock it is pushed into the holes and bites into the stock and can not shift at all. you can never remove it without grinding it out but this is the way i believe you get the best adhesian and you dont get cracking or slipage of the bedding compound. I also use Devcon Steel for all large kicking rifles.

Cheers Bill
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  #10  
Old 12-06-2006, 12:40 AM
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Re: Primer/Ignition question?

I used Marine-Tex and a Dremel. I didn't let it sit for a week, just 3-4 days. It seems to work well. I didn't get as fancy as you, however I think it does the job. I would be more worried about that flimsy looking recoil lug than the bedding job. It requires you lift from an exact 90 degree angle to even remove the barreled action from the stock, and it's a tight fit even at that.

The tang, and the bottom metal are also bedded.
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  #11  
Old 12-06-2006, 05:38 AM
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Re: Primer/Ignition question?

[ QUOTE ]
SNIP
It requires you lift from an exact 90 degree angle to even remove the barreled action from the stock, and it's a tight fit even at that.

The tang, and the bottom metal are also bedded.

[/ QUOTE ]

Two items for me.

1) if you bed the recoil lug 100%, then any bit of dust or lint or anything can get trapped below or on the sides of the lug which may add stress. I have used two layers of tape to the front and sides of the lug...just in case [img]/ubbthreads/images/graemlins/smile.gif[/img]

2) Some rifles prefer a floated tang area. Since on most actions the area is small I tend to float anything away from the main action diameter.

edge.
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  #12  
Old 12-06-2006, 08:55 AM
 
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Re: Primer/Ignition question?

This is an interesting subject because I just got rid of a Kimber Varmint in .22-250 due to the same problem. [img]/ubbthreads/images/graemlins/frown.gif[/img]
Three shot groups into .385 but 5 shot groups were over 1.25 [img]/ubbthreads/images/graemlins/mad.gif[/img] Barrel completly free floated, action bedded. Scoped the barrel and it looked good. [img]/ubbthreads/images/graemlins/confused.gif[/img] Tried all kinds of loads in it and finally got [img]/ubbthreads/images/graemlins/mad.gif[/img] [img]/ubbthreads/images/graemlins/confused.gif[/img] [img]/ubbthreads/images/graemlins/blush.gif[/img] [img]/ubbthreads/images/graemlins/crazy.gif[/img] and gave up and traded it in. My new Remington VSF in .22-250 does not seem to have that problem at all. It just shoots good all the time. I now have a lot less hair due to the Kimber but am a lot happier due to the Remington.
My gunsmith said that it was due to the barrel not being stress relived right. It was the only thing we could think of that was left. Good looking gun but looks arn't what make a gun good.
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  #13  
Old 12-06-2006, 10:58 AM
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Re: Primer/Ignition question?

My vote goes for heat. Try a long break between 3 shott groups. I mean get the barrel temp down to ambient temerature and then see what happens.
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  #14  
Old 12-06-2006, 07:04 PM
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Re: Primer/Ignition question?

What Rouge K siad. If that doesnt work, its your bedding.
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