🎯 When a Custom Rifle Build Goes Wrong: The 7 Moses Action Failure

Everybody loves showing:

  • Tiny groups
  • Perfect builds
  • Long-range hits
  • “Quarter-inch guns”

But what you don’t usually see?

👉 The failures.

In this video, Rob and Jeromy do something most channels avoid:

They show the struggle.

A real problem.
A real setback.
And a custom rifle build that started falling apart right in the middle of load development.


🎥 Watch the Full Video


🔥 Key Takeaways

  • Old actions can create serious reliability issues in custom builds
  • Bolt timing problems can mimic pressure signs
  • The issue progressively worsened over time
  • The rifle showed NO actual pressure indicators
  • Long action vs short action became part of the investigation
  • Real-world testing exposes problems fast

The Goal: Match Velocities Between Two 7 Moses Rifles

This video started as a normal load development session.

The plan was simple:

👉 Match the velocity between Rob and Jeromy’s custom 7 Moses rifles.

Setup:

  • 183gr Sierra MatchKings
  • H4350 powder
  • Testing for ~2850 FPS

And initially?

Everything seemed fine.


Then the Bolt Started Fighting Back

During the first round of testing:

Jeromy’s rifle started showing:

  • Sticky bolt lift
  • Strange resistance
  • Random hard extraction

But here’s the weird part:

👉 It didn’t act like pressure.

As Rob explains:

  • Primers looked normal
  • Brass looked normal
  • No ejector swipes
  • No classic overpressure signs

Yet the bolt still struggled.


The “Love Bump” Problem

One of the funniest—and most frustrating—parts of the video:

The bolt would:

  • Lift mostly fine
  • Then stop at the very top
  • Require a little “love bump” to unlock

At first?

It seemed minor.

But as shooting continued…

👉 It progressively got worse.


A Different Day… Same Problem

To rule out pressure issues:

They:

  • Lowered the powder charge
  • Reduced velocity
  • Came back another day

The expectation?

👉 Less pressure = smoother bolt

But instead…

The action continued degrading.

That was the huge clue.


Why This Wasn’t Pressure

This became the central mystery of the video.

Normally, pressure signs include:

  • Flattened primers
  • Ejector swipes
  • Sticky extraction from pressure
  • Brass damage

But none of that was happening.

Instead:

👉 The action itself felt rough and inconsistent.

As Jeromy explains:

“It almost felt like the lugs were grinding.”

That’s VERY different from classic pressure.


The Action: A 20-Year-Old Remington 700

And here’s where things got interesting.

Jeromy’s build used:

👉 A 20-year-old Remington 700 long action

Originally:

  • His first hunting rifle
  • Sentimental value
  • Reused for the custom build

But according to discussions they later had:

👉 Older Remington actions may have timing issues.


What Is “Timing” in a Bolt Action?

Without getting overly technical:

Bolt timing refers to:

  • How the lugs engage
  • How the bolt unlocks
  • Alignment during cycling

If timing is off:

  • Bolt lift becomes rough
  • Extraction gets inconsistent
  • Cycling feels “grindy”

And that’s exactly what this rifle started doing.


The Strange Part: It Got Worse Over Time

This is what really confused Rob and Jeromy.

Initially:

  • The rifle mostly worked
  • Only occasional issues

Then:

  • More resistance
  • More failures
  • More inconsistency

Eventually:

👉 The rifle became basically unshootable.

As Jeromy explains:

“The gun is now unshootable.”


Rob’s Rifle Proved It Wasn’t the Load

To verify the issue:

They switched over to Rob’s rifle.

Same setup:

  • Same cartridge
  • Same speeds
  • Same general load

But Rob’s rifle:

  • Cycled perfectly
  • Showed no pressure
  • Ran clean

That ruled out:

  • Powder charge
  • Velocity
  • Cartridge design

And pointed directly at:

👉 The action.


Long Action vs Short Action

Another variable in the discussion:

Jeromy’s rifle:

  • Long action

Rob’s rifle:

  • Short action

Jeromy specifically chose the long action to:

  • Seat bullets farther out
  • Relieve pressure
  • Experiment with performance

But ironically…

👉 The action itself became the limiting factor.


The One Thing They Did Right: Staying Calm

One underrated part of the video:

Even when the rifle locked up:

  • No panic
  • No unsafe handling
  • No rushing

At a public range especially…

👉 That matters.

It’s a good reminder that:

  • Mechanical failures happen
  • Staying calm matters
  • Safety always comes first

Why This Video Matters

This is honestly one of the best things Bald Guys With Guns does.

They show:

  • The wins
  • The failures
  • The frustration
  • The troubleshooting

Because custom rifle building isn’t always:

  • Easy
  • Perfect
  • Smooth

Sometimes:

👉 You spend serious money just to discover a hidden issue.


The Group That Proved the Rifle Had Potential

Ironically…

Right in the middle of all the frustration:

Rob’s rifle printed an incredible group with:

  • 51.2gr H4350
  • Excellent velocity
  • Tight accuracy node

And of course…

👉 Rob still blamed himself for the flyer.

Classic Rob moment.


The Real Lesson: Sentiment Doesn’t Always Win

This was probably the hardest realization in the video.

Jeromy wanted to keep:

  • His first hunting rifle
  • The sentimental action
  • The history behind it

But eventually…

👉 Reliability matters more.

And the decision was made:

The action gets replaced.


📬 Want More Real-World Shooting Content?

If you enjoy:

  • Honest rifle testing
  • Load development
  • Custom rifle builds
  • Real-world troubleshooting

Join the Bald Guys With Guns newsletter:


Final Thoughts: Custom Builds Aren’t Always Glamorous

Social media usually shows:

  • The success
  • The tiny groups
  • The highlights

But this video showed something better:

👉 Reality.

And honestly?

That’s what makes it valuable.

Because anybody building custom rifles long enough will eventually run into:

  • Weird problems
  • Mechanical failures
  • Expensive setbacks

The difference is:

👉 Most people don’t show it.

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