need help

[precision308]

This is what I got....
New 700 action
26" bartlein 5r m24 260rem
Ptg bolt
Tps steel 20 moa base
Spur mount
Timney trigger
AI 2.0 chassis
Vortex eazor 5-20 ebr-2b

I can only get about 2 inch groups with lapua brass. Load I'm using is 142 smk 43.5gr h4350 with 210m primer. I changed my brass to remington due to neck tension issues. Accuracy now at 1.5" @ 100yds. I have other rifles that I consistantly shoot .5" so I believe I'm doing my part. Ive seen my smiths work and trust him. He thinks that chassis needs to be bedded it is going back to him this weekend just for that. I get 2-3 shots clustered at about.75" and the other two go about an inch away at 10 or 11 oclock. Any suggestions on what can be done or checked. Everything seems solid I just didn't think I would need to bed a chassis.

 

[GrantA]

Was the action torqued properly in the chassis? Base/rings also?

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[precision308]

Yes 30 on the base 50 on the mount and 53 on the chassis. The front base screw is not touching the barrel threads either

 

[GrantA]

Not that it should make the difference you'd need to find but isn't it supposed to be more like 65in-lb on the action?

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[precision308]

From what I found remington says 45. Many after market stocks are 65. For whatever reason AI says 53. When you torque the action down u can see it pull in the chassis so I think bedding will help it is just a matter of how much.

 

[jim_k]

Bed the chassis; try different bullet jumps; check neck tension for consistency. After sizing, run a mandrel down the neck (dry), and sort brass for consistent neck tension. Rem brass has very consistent case water volume, so I like those. Diamond-lapping takes the place of barrel break-in, so I'd do that.
Jim

 

[Frank Green]

You don't say what recoil lug you are using on the action? Check to make sure that the recoil lug is not bottoming out in the AI stock. We have a AI chassis stock here that we will throw on Rem.700 guns to do quick testing etc.....and have found that depending on which recoil lugs that are used they can bottom out in the stock. One lug was so long that just as the rear action screw started to get tight/tension on it it would bow the action so bad that the bolt would bind and you couldn't even work it.

If the recoil lug is bottoming out in any way it will give you accuracy issues/problems.

Also the experience with other aftermarket stocks. I've seen the recoil lug will bind on the front side or back side of the lug as well as I've seen the trigger guard screws not line up with the receiver as well.

Also check for no muzzle crown damage. Weather from the installation work or cleaning damage. This is very easily done and not checked when there are accuracy issues as well.

Also how does the barrel clean? If it's cleaning relatively easy and no real fouling issues then I would say it's nothing with the barrel. If you have any concerns give us a call.

Let us know what you find out?

Later, Frank
Bartlein Barrels

 

[precision308]

The first 10 rounds or so pulled a little copper but that has stopped. It has a fat badger lug on it. The smith had to mill the stock out for it to fit. It is not bottoming out. It is going back to him sat so he can bed it. Then we see from there. Hopefully that fixes it. My case overall with the 142smk is 2.830 which is what the smith suggested. He has done a half dozen rifles identical to this with different stocks and they all perform great.

 

[oldfatguy]

Might be time to do an OCW work up.

OFG

 

[neeltburn]

Let your smith bed it, and give it a shot. If that does not do what you want, I would put a scope one the rifle you have vetted in that past and try again. I would not expect that you have a bad Vortex out of the box, but it is something you can quickly rule out.


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