Won't shoot to the point of aim

[Charlie-NY]

I've got a Browning Hell's Canyon LR McMillan in 6.5 Creed. The rifle wears a Swarovski 5-25 scope. It is mounted using the provided tapered pic base (20moa?) and Burris Signature rings. The rifle was sighted in at 400 yds without issue.

I decided to have a new barrel put on the rifle and had a 24" Bartlein 8 twist installed. I also had it pillar bedded while the gunsmith had it. I took it to the range yesterday and it impacts about one foot low @ 400yds with the up adjustment maxed out. What could be causing this?

 

[Halffull]

Are the Burris rings the ones with the bushings that can change the cant?. Is it possible that you used a different combination of bushings when you re-installed the scope?

 

[SBS]

If you have plus/minus inserts in the rings, they could be causing this, particularly if they are not in the correct orientation. If both are still "0", you could use some plus/minus and get it on track.

 

[Charlie-NY]

Are the Burris rings the ones with the bushings that can change the cant?. Is it possible that you used a different combination of bushings when you re-installed the scope?

Yes - The rings have Burris inserts. The inserts are all the "0" inserts. With the factory tapered base there isn't a need to use offset inserts, even at distance. Originally, the rifle shot great at 400yds. Nothing in the mounting system has changed that I know of. Not sure if the smith even removed the scope.

I could change the inserts but something is apparently not right and inserts seem like a poor solution. The scope should get me on at 400yds even if it didn't have a tapered base, but it does have one.

 

[AlNyhus]

Was the receiver faced and/or a different recoil lug fitted when the barrel was changed? -Al

 

[Charlie-NY]

Was the receiver faced and/or a different recoil lug fitted when the barrel was changed? -Al

No - I had the rifle pillar bedded but not blueprinted. No new recoil lug either

BTW - I ordered some offset inserts but this seems like a mask to a serious issue.

 

[Walt Krafft]

Is the rail backwards?

 

[coldboreshot]

Consult your smith. I think he should have removed the scope and perhaps even the scope base for the process of rebarreling and bedding. An honest mistake would be possibly the scope base was placed back on the action backwards. Sometimes these things happen. Measure each end of the base.

 

[SKWERLZ]

Consult your smith. I think he should have removed the scope and perhaps even the scope base for the process of rebarreling and bedding. An honest mistake would be possibly the scope base was placed back on the action backwards. Sometimes these things happen. Measure each end of the base.

Makes the most sense to me.

 

[bugman]

Before you get into all of these suggestions and expense.......just MECHANICALLY rezero the elevation and windage turrets on that scope. Then find the optical zero as usual. If you still don't have enough elevation, then carry on with some of the suggestions already given

 

[Sniperhandle]

If the barrel was not dialed in dead nuts and the Tenon is crooked, And or the high spot of the arc of the bore was not clocked at 12 O'clock, But clocked at 6 O'clock inadvertently, Then you will run out of elevation.

 

[GenePoole]

If the barrel was not dialed in dead nuts and the Tenon is crooked, And or the high spot of the arc of the bore was not clocked at 12 O'clock, But clocked at 6 O'clock inadvertently, Then you will run out of elevation.

It would have to be very crooked. If we assume a 20 thou runout at the muzzle (not atypical in my experience) and it gets pointed down, that's roughly arcsin(24/0.020) = 0.048° or only about 2.8 MOA.

 

[Charlie-NY]

Is the rail backwards?

No - and I don't believe that it was ever removed.

 

[Charlie-NY]

Before you get into all of these suggestions and expense.......just MECHANICALLY rezero the elevation and windage turrets on that scope. Then find the optical zero as usual. If you still don't have enough elevation, then carry on with some of the suggestions already given

Just to be specific - the scope is a Swarovski Z5 5-25x52BT. One thing that I noticed that I can't explain is the scope is supposed to have 43moa of adjustment. The elevation turret has a bit less than one revolution of adjustment from one extreme to the other. I just counted the 1/4moa clicks and get 49 from the bottom to the top. That would put it at 12moa of adjustment.

The interesting thing is that there were no issues before the work was done.

 

[Charlie-NY]

Consult your smith. I think he should have removed the scope and perhaps even the scope base for the process of rebarreling and bedding. An honest mistake would be possibly the scope base was placed back on the action backwards. Sometimes these things happen. Measure each end of the base.

I sent the smith a text and am waiting for his reply. A rough measurement of the scope base-to-slot reveals about a .030" difference with the rear being taller as it should be. How much elevation would that roughly equate to? It is the factory supplied Browning base for the LR McMillan rifle in 6.5 Creed.

 

[Sniperhandle]

It would have to be very crooked. If we assume a 20 thou runout at the muzzle (not atypical in my experience) and it gets pointed down, that's roughly arcsin(24/0.020) = 0.048° or only about 2.8 MOA.

I have seen it happen before.

 

[Sniperhandle]

We had a factory Remington barrel that was machined so crooked we could not get it on target at 100 yards.

 

[Charlie-NY]

We had a factory Remington barrel that was machined so crooked we could not get it on target at 100 yards.

I certainly wouldn't expect that from a new Bartlein bbl. And wouldn't the smith detect something like that during installation?

 

[WSnyder]

Just to be specific - the scope is a Swarovski Z5 5-25x52BT. One thing that I noticed that I can't explain is the scope is supposed to have 43moa of adjustment. The elevation turret has a bit less than one revolution of adjustment from one extreme to the other. I just counted the 1/4moa clicks and get 49 from the bottom to the top. That would put it at 12moa of adjustment.

The ballistic turret is limited to one turn with the rings on the turret. You need to remove the rings to get the full travel available when sighting it in. Once sighted in you replace the turret rings.

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[CJ6]

It's possible that the barrel is indexed in the "down" position.