OzFclass

Hi All,
I have Just bought a new dolphin aluminium modular stock for FO. I hit the range yesterday and got some vibration in my reticle.
It’s a 6BR built on a rem action with nightforce NSX scope, rail & rings. It was shot from a front rest and rear bag.
Have checked all screws to make sure there tight and torqued up to the right specs. Any suggestions on how to fix the problem or has anyone had this problem before?

Any help is much appreciated.

Tolong, what model stock did you get from Mik at Dolphin ? Is it Carbon Fibre , or laminated etc ?
Can you describe the "vibration" a little more ? Are you seeing visible vibration of the reticle after the shot is fired, as you keep your head down as part of your follow through, still looking through the scope at your target ?
Do you shoot with some shoulder pressure against the butt, or is it more like free recoil ?
Are all adjustable units and lock nuts on the front rest absolutely tight/firm ?

I got the dolphin aluminium modular stock with the f-open for-end. I'm seeing visible vibration in the reticle after each shoot. I'm shooting with free recoil as we'll, I thought that might of been an issue with the front rest but I checked and re checked my whole set up. I even tried bringing the front rest closer, as the for-end is quite long and that didn't help.

Tolong,
I think you need to test the scope on another rifle as the next step.
Alan

If you are seeing what I call reticle bounce than I'm going to say the stock has nothing to do with it.

When you shoot the gun does it throw rounds/have accuracy problems? If so I'm going to say the scope isn't holding zero.

Two simple tests you can try/do.

First one is set the gun up in a nice steady rest so the gun isn't moving at all. Dry fire the gun. If you see the cross hairs bouncing/vibrating in the scope the scope will not hold zero.

Second thing you can do. When the gun is in the rest/set up very stationary pick and object you can focus on with the cross hairs. While holding the gun real steady move the windage knob completely from left to right while looking thru the scope. If you see the elevation changing as you run thru the full adjustment the scope is not tracking properly. You can do the same thing for the elevation knob as well. If the cross hairs are wondering the scope isn't tracking.

Later, Frank
Bartlein Barrels

I have the same stock and it has 2 disappointing features - with a Barnard action the bedding support is very narrow, much narrower than a Barnard V Block for example provides. I have skim bedded mine. The other annoying feature is the amount of flex in the fore end. Measure it yourself - set rifle up on the rest, magnetic base on barrel at end of fore end and DTI touching fore end. Lift rifle off rest by holding barrel and action and watch for the horrible deflection on the DTI. You don't even need to use the DTI just squeeze the barrel and fore end to get an idea. Yes I know every rig squeezed like this will flex but the Dolphin is excessive in my opinion. Whether this contributes to a "vibration" after firing I don't know. If it does you would have to be very quick to pick it up. You haven't said whether the Dolphin is a replacement stock and if you used another type b4 and the issue was present with that? Would suspect the scope though. What is the guns performance, perceived vibration aside, in the Dolphin stock like?

Had the rifle on a wild dog stock and had no problems before. I know what you mean about the flex
I was shooting consistent 57 to 59 with the wild dog. Last weekend was my first shot with the dolphin
Scored a 55 and a 58.

6.5x55ai wrote:I have the same stock and it has 2 disappointing features - with a Barnard action the bedding support is very narrow, much narrower than a Barnard V Block for example provides. I have skim bedded mine. The other annoying feature is the amount of flex in the fore end. Measure it yourself - set rifle up on the rest, magnetic base on barrel at end of fore end and DTI touching fore end. Lift rifle off rest by holding barrel and action and watch for the horrible deflection on the DTI. You don't even need to use the DTI just squeeze the barrel and fore end to get an idea. Yes I know every rig squeezed like this will flex but the Dolphin is excessive in my opinion. Whether this contributes to a "vibration" after firing I don't know. If it does you would have to be very quick to pick it up. You haven't said whether the Dolphin is a replacement stock and if you used another type b4 and the issue was present with that? Would suspect the scope though. What is the guns performance, perceived vibration aside, in the Dolphin stock like?

Did you get any reticle vibration?

No vibrations that I can see. I was using a Robertson Composites stock and the switch to the Dolphin took some getting used to.
Until I skim bedded it I was swapping the stock between 3 guns. Scopes are Leupold, Nightforce, Sightron. Never detected any problems but that's not say I am sharply attuned to detecting such as you describe. Couple of groups below shot with one of them in Dolphin. Yep I know they are only 3 shot groups at 100yds, hardly indicative for long range.