If you’ve ever wondered what it actually takes to dial in a rifle for extreme accuracy…
This is it.
In this video, Rob and Jeromy take “Slimer”—their custom 6PRS Moses rifle—and run it through full load development to prepare it for a head-to-head comparison against a 6GT and a 6 Dasher.
And what they find?
👉 Small changes make a massive difference.
🎥 Watch the Full Video
🔥 Key Takeaways
- A 0.1 grain powder change can cut group size in half
- Seating depth didn’t significantly impact this setup
- The rifle showed a strong accuracy node around 28.8 grains
- Lowering to 28 grains helped reach target velocity (~2850 FPS)
- Consistency (low SD) matters just as much as group size
- Even great setups still get “that one shot”
The Goal: Match Performance Across Platforms
This wasn’t just random shooting.
The goal was to tune Slimer to:
- Match velocities of a 6GT and 6 Dasher
- Use the same projectile (105gr Berger Hybrid Targets)
- Create a fair comparison for a future video
That means dialing in:
- Velocity
- Accuracy
- Consistency
👉 All at the same time.
Starting Point: Too Much Powder
Rob kicked things off with:
- 28.9 grains of H4895
- Multiple seating depths (adjusted in .003 increments)
The result?
- Groups around ~0.8 MOA
- Inconsistent performance
- Clearly not what this rifle is capable of
And that’s the key takeaway early on:
Just because a load is “close” doesn’t mean it’s right.
The Breakthrough: Dropping to 28.8 Grains
This is where things changed fast.
Dropping just 0.1 grain to 28.8:
- Cut group size in half
- Produced sub-half MOA groups
- Delivered single-digit SDs
👉 That’s a massive improvement from a tiny adjustment.
At this point, it was clear:
The rifle had entered an accuracy node.
Seating Depth: Did It Matter?
Interestingly…
Changing seating depth didn’t have a major impact in this test.
- Multiple seating depths produced similar results
- The rifle stayed consistent across variations
That’s actually a good thing.
👉 It means the load is more forgiving and easier to replicate.
Fine-Tuning Velocity: Dropping to 28 Grains
Now came the next challenge:
👉 Matching velocity for the upcoming comparison
Target speed:
- ~2850 FPS
So Rob dropped to 28 grains.
What happened?
- Groups stayed tight (~0.3–0.5 MOA)
- Velocity came down into the desired range
- Still maintained strong consistency
This is where the setup really came together.
The Reality of Shooting: “You Threw One”
Let’s talk about something every shooter knows…
👉 That one shot.
Throughout testing:
- 4 shots stacked tight
- 1 shot opens the group
And yeah—Rob owns it.
It happens.
But here’s what matters:
- The rifle consistently showed tight 4-shot clusters
- The underlying accuracy is clearly there
Multiple Days, Same Results
This wasn’t a one-day fluke.
Across:
- Multiple sessions
- Different temperatures
- Repeated testing
The results held:
- ~0.4 MOA average performance
- Consistent velocity
- Reliable accuracy node
That’s how you know a load is legit.
What This Means for Load Development
This video highlights a few big lessons:
1. Small Changes = Big Results
0.1 grain made a huge difference.
2. Find the Node
Once you hit it:
- Groups shrink
- Consistency improves
- Everything gets easier
3. Don’t Overcomplicate Seating Depth
Sometimes it matters.
Sometimes?
👉 It doesn’t.
4. Consistency > Perfection
You’re not chasing one perfect group.
You’re chasing:
- Repeatability
- Stability
- Predictability
What’s Next: 6PRS Moses vs 6GT vs 6 Dasher
Now that Slimer is dialed in…
👉 It’s ready for the real test.
Coming up:
- Head-to-head comparison
- Same bullet
- Matched velocities
- Real-world performance
This is where things get interesting.
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Final Thoughts: This Is Why Reloading Matters
This entire video proves one thing:
👉 You don’t find this level of performance by accident.
It takes:
- Testing
- Adjustments
- Time behind the rifle
And when you get it right?
You end up with a rifle that can stack shots in the same hole.