T/C Venture and Dimension Trigger Spring Installation Guide

The T/C Venture and Dimension trigger housing has more going on inside it than a typical bolt-action trigger. That is not a reason to avoid this job – it is a reason to read this guide completely before picking up any tools. Once you understand what is in there and why, the work is straightforward. Here is the complete procedure.

What Makes This Job Different From Other Bolt-Action Triggers

Most bolt-action trigger springs are accessible after removing two pins and lifting a trigger shoe. The T/C Venture/Dimension trigger is a modular self-contained housing with a sideplate, C-clips, a pivot pin, a guide plug, and two adjustment screws with lock nuts inside. There are more parts to track, more steps to follow in sequence, and more opportunities to put something back incorrectly if you rush.

The job is not difficult. It takes most owners 15-20 minutes once they understand the sequence. But the T/C housing is the kind of work that punishes impatience and rewards preparation. Read this guide once before starting. Take photos before moving any part. Keep a magnetic tray next to the bench for the small parts that will come out. Do those three things and the rest follows naturally.

This guide covers both the T/C Venture and T/C Dimension – the trigger housing is identical on both rifles. The procedure is the same from start to finish.

Compatibility note before you start: This guide and this spring apply to the original T/C Venture and T/C Dimension only. The T/C Venture II has a blade safety inside the trigger shoe and a different housing. If your trigger has a small inner blade or lever visible, stop – this is the wrong guide for your rifle.

For context on pull weights and whether this upgrade is right for your use case, see the trigger spring overview on this site.

Tools You Need

• Action screwdriver – correct size for your Venture or Dimension action screws
• Torque wrench – recommended for action screw reassembly
• Small punch set – 1/16 and 3/32 inch for the trigger housing pins
• Lightweight brass or nylon hammer
• C-clip pliers or a small dental pick – for the three C-clips inside the housing
• Small Allen wrench set – for the trigger adjustment screws (they are small; use quality wrenches, not worn ones)
• Small flat screwdriver or dental pick for spring handling
• Needle-nose pliers
• Non-marring mat or folded shop towel
• Magnetic parts tray – essential for this job, not optional
• Phone for photos – before any part moves
• Trigger pull gauge
• Heat gun or penetrating oil – for the factory locktite on adjustment screws
• Small drop of nail polish or removable thread locker for final screw re-securing

Safety First – Every Step, Every Time

• Remove the magazine if present
• Open the bolt and lock it rearward
• Look into the chamber and visually confirm empty
• Put your finger in the chamber and feel – confirm empty
• Remove all ammunition from the bench
• Muzzle pointed in a safe direction throughout

Once the action is out of the stock, do not pull the trigger for any reason until the safety tests at the end. Every time, no exceptions.

Step 1 – Remove the Bolt

With the safety in the fire position, open the bolt fully and pull it rearward and out. On the T/C Venture and Dimension, the bolt release tab is at the rear left of the receiver – press it while pulling the bolt out. Set the bolt on your mat.

Step 2 – Remove the Action From the Stock

The Venture and Dimension use two action screws – one at the front and one at the rear of the trigger guard. Remove both. Note which position each came from if there is any chance they differ in length. Lift the barreled action straight up and out of the stock. Set the stock aside. Barreled action on the mat.

Step 3 – Identify the Trigger Housing and Take Photos

Place the barreled action on the mat with the underside facing up. Locate the trigger housing – the rectangular metal box secured to the bottom of the receiver. You will see the two housing pins that retain it, and on the side of the housing you will see the two adjustment screws with their lock nuts.

Take photos now from every angle: top of the housing, both sides showing the adjustment screws, and the front and rear of the housing showing the pin locations. You are about to disassemble a housing with multiple small parts – your photos are your reference for reassembly.

Step 4 – Address the Factory Locktite on Adjustment Screws

Before removing the housing pins, deal with the adjustment screws. T/C applied locktite to both adjustment screws from the factory. You need to break this compound loose before attempting to turn the screws – trying to force them without softening the locktite first will strip the small Allen heads.

Apply gentle heat to the housing near each adjustment screw using a heat gun – low heat, 150-200°F is enough to soften standard blue locktite without damaging anything. Alternatively, apply a small drop of penetrating oil to each screw and give it 10-15 minutes to work. Either method gets the compound moveable. Do not try to turn the screws cold against factory locktite.

Once the compound is softened, loosen the lock nut on each adjustment screw slightly – just enough to allow adjustment later. Leave both screws in place for now. You will set them properly after the spring is installed.

Step 5 – Remove the Trigger Housing From the Receiver

Using the 3/32 punch and light hammer taps, drift out the two pins that secure the trigger housing to the receiver. These pins typically drift from right to left – confirm the correct direction on your rifle before striking. Both pins come out completely. Set them in the magnetic tray.

With both pins removed, the trigger housing drops straight down out of the receiver. If it does not drop freely, confirm both pins are fully out. Do not pry. Set the receiver aside.

Step 6 – Open the Housing

Place the trigger housing on your mat with the sideplate facing up. Inside you will see the two sideplate locking screws – these are small screws that secure the sideplate to the housing. Remove both and set them in the magnetic tray.

Before removing the sideplate, you will also see three C-clips inside the housing: one on the safety lever assembly, one on the sideplate locking pin, and one on the trigger pivot pin. Use the C-clip pliers or a small dental pick to carefully remove all three C-clips. These are small and under slight tension – work over your mat or a white paper towel so nothing disappears. Set all three C-clips in the magnetic tray.

With the C-clips and sideplate screws removed, the sideplate lifts off to expose the internal components. Set it aside carefully.

Step 7 – Study the Internals Before Moving Anything

Take photos of the exposed trigger internals. You should now be able to see the trigger, the sear, and the trigger spring sitting between them. Look carefully at the spring: note which end contacts the sear and which end contacts the trigger shoe. At the point where the spring contacts the trigger shoe, there is a small guide plug – a tiny component that sits in the end of the spring coil where it meets the trigger. This guide plug matters and it must go back in the correct position and orientation during reassembly.

Take a close-up photo specifically of the guide plug position before removing the spring. This is the single most important photo of the job.

Step 8 – Remove the Trigger Pivot Pin and Factory Spring

The trigger pivot pin holds the trigger in the housing. With the C-clip already removed, the pin drifts out with the punch. Support the trigger as the pin comes out so it does not drop and take other parts with it.

Once the trigger can be moved, you have access to the trigger spring. Note the guide plug position one more time before touching the spring. Use needle-nose pliers or a dental pick to carefully remove the spring and the guide plug together. Set both in the magnetic tray. The guide plug is small – treat it like the detail it is.

Keep the factory spring. You want it available if anything needs to go back to original.

Step 9 – Install the New Spring

Orient the new spring in the same position as the factory spring – same direction, same end toward the sear, same end toward the trigger. Place the guide plug in the trigger-side end of the new spring, exactly as it sat on the factory spring.

Seat the spring between the trigger and sear with the guide plug correctly positioned against the trigger shoe. The spring should sit without bridging, twisting, or contacting anything it should not. Compare to your photos from Step 7. If it does not look exactly right, take it out and reposition it before continuing.

Step 10 – Reassemble the Housing

Reinstall the trigger pivot pin through the trigger and housing. The trigger should move freely on the pin after it is seated. Reinstall all three C-clips in their correct positions – sideplate locking pin, safety lever assembly, and trigger pivot pin. Confirm each C-clip is fully seated in its groove.

Replace the sideplate and reinstall the two sideplate locking screws. Do not overtighten – snug is correct. Verify that all components visible through any openings are correctly positioned and nothing is binding.

Step 11 – Set the Adjustment Screws

With the housing assembled but before reinstalling it in the receiver, set both adjustment screws. The factory locktite is broken, both lock nuts are slightly loose – now is the time to dial these in properly.

Creep screw (rear/lower): This controls how far the trigger moves before the sear releases. With the trigger housing out of the rifle, manually cock the mechanism by pressing the sear rearward. Press the trigger slowly and feel where the break is. Tighten the creep screw gradually until the trigger breaks with minimal pre-travel – but do not go so far that the mechanism cannot be safely cocked. Back off a fraction if in doubt. Conservative is correct here.

Over-travel screw (front): This controls how far the trigger continues to move after the break. Adjust it to limit excess travel after the break without causing any binding. A small amount of over-travel is acceptable and safer than binding.

When both screws are set, tighten each lock nut carefully without moving the adjustment screw. Add a small drop of nail polish or removable thread locker to each screw to keep the setting in place. Do not use permanent locktite – you want to be able to adjust these again if needed.

Step 12 – Reinstall the Housing in the Receiver

Seat the trigger housing back into the receiver. Align the pin holes in the housing with the pin holes in the receiver and drive both pins back in fully – seated flush where they should be flush. The housing should sit solidly with no movement.

Step 13 – Return the Action to the Stock

Lower the barreled action back into the stock, confirming it seats correctly. Install the action screws evenly – bring both to hand-tight before applying final torque, working them up together. Torque to the manufacturer specification if you have a wrench. Reinstall the bolt.

Measuring Pull Weight

Confirm the rifle is unloaded. Cock the action by cycling the bolt. Attach the trigger pull gauge to the center of the trigger shoe. Apply smooth, straight rearward pressure until the trigger breaks. Repeat five times and average.

Expected range: ~1.4-2.0 lb depending on how the adjustment screws are set. If the pull is significantly outside this range, check the spring installation and adjustment screw settings before proceeding to safety tests.

The Four Safety Tests – Complete All Four

All four tests on an unloaded rifle. All four must pass before any live ammunition.

Function check: Cock the rifle and press the trigger. Clean release and correct reset. Cycle the bolt and repeat eight to ten times. Every pull must feel identical.

Safety check: Cock the rifle and engage the safety. Apply firm firing pressure to the trigger – the sear must not release. Disengage the safety and confirm normal function. Test the safety in both positions multiple times.

Bump test: Cock the rifle with the safety off. Hold it firmly and strike the buttstock solidly against your palm several times – deliberate impacts, not taps. The firing pin must not release on any impact.

Drop test: Cock the rifle and, from two to three inches above a padded surface, let the butt make firm contact. Repeat several times. The firing pin must not release. This test matters particularly after a trigger housing disassembly – confirm all pins are fully seated and the housing is secure before this test.

Fail any test: stop immediately. Do not use the rifle. If the creep screw is set too aggressively, the rifle may fail the function check or fire on bolt close – back the screw off and retest. Any other failure warrants reinstalling the factory spring, correcting the installation, or taking the rifle to a qualified gunsmith.

Long-Term Care

The T/C trigger housing is a sealed unit when assembled. Keep it clean and lightly lubricated. Avoid flooding it with heavy oil – light gun oil on metal contact points is sufficient. After any season or hard field use, verify that pull weight and safety function still feel normal. If the adjustment screws ever feel like they have moved, recheck the settings and resecure the lock nuts.