Assembly Instructions

All HALDON chassis' include a precision milled inlet, allowing a drop-in fitment as standard. This means there is no additional assembly required, other than screwing-in your barrelled action.

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Step 1: Setting up

Firstly; check your rifle is clear of ammunition, including the removal of the magazine. Remove the bolt mechanism and place in a safe location. Check your rifle is safe with a visual check from the rear of the action, ensuring you can see daylight through the barrel. ​

 

Step 2: Removing the Barreled Action

Remove the action screws, one at a time, ensuring to clamp the action to the incumbent stock (by hand), avoiding dropping the barrelled action or stock. Once the screws are released, gently remove the barrelled action from the stock and place both items on a clean, level surface. Make sure to keep the old action screws with the old stock and do not mix them up with the items supplied by HALDON.​

 

Step 3: Assembling the Barrelled Action into your HALDON Chassis 

Resting your chassis on a secure platform, check that the recoil lug is in position (Tikka actions only). Present the barreled action into position, using the action screw holes as a visual reference. Take care to allow the trigger to drop through the slot above the trigger guard region and check that key surfaces are interacting correctly, especially around the recoil lug. The weight of the barrel may make the barreled action drop forwards – try to avoid this by using your hand as a clamp in-between the two action screws, ensuring both elements are held tightly together. 

Step 4: Pre-Torque the Build

Holding the action tightly to the chassis, position the entire system vertically, resting the recoil pad on the level surface in front of you, pointing the barrel upwards. Insert the action screws into the correct holes. Gently tighten the action screws until they contact the head recesses within the chassis. Now release them back by half a turn. 
Very gently, tap the whole system on the ground (from a height of 12mm or 1/2 inch). Check that all surfaces appear to be fitting snugly, in the correct location before tightening the action screws.

Step 5: Torque Settings

Each manufacturer will provide guidance on the correct torque settings for your rifle.
For rimfire actions, we recommend starting with 5.5Nm (50in-lbs) for each action screw (front and rear). The maximum advised torque for each action screw in a rimfire set-up is 7Nm (62in-lbs). Note; the smaller rimfire actions can be more heavily influenced by the action screw torque - so please check your groupings - and that the bolt is running smoothly.
For centerfire actions, we recommend  starting with 6Nm (53in-lbs) for each action screw (front and rear). Work this up a little in 1/2Nm increments, checking your groupings. Do not exceed 9Nm (80in-lbs).

Step 6: Final Checks 

Ensure the action screws are set to the correct torque setting before rotating the system back into it's horizontal plane. Check that the barrel is parallel to the fore end of the chassis. If the recoil lug has not located correctly it will be quite obvious with the barrel noticeably out of position. 
Be careful to check that the bolt mechanism fits back into position and that the action screws do not obstruct it in any way. Before firing, check your torque settings once again to ensure you are satisfied that the system is safe to operate. Once correctly assembled, re-zero and test with a minimum of 10 x rounds.

Step 7: Review and Repeat

If you are not entirely satisfied with your groupings, repeat Steps 1 - 6, using a stepped increase in torque values with 1/2 Nm (5in-lbs) increments.
 

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