Borely University

Know your barrel.
Know your data.

From first shot to final round — a free, comprehensive guide to precision barrel science, load development, atmospherics, and data-driven shooting.

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Curriculum

Six chapters. One complete picture.

From the habits that make your first 100 rounds count to the physics of barrel wear and the science of atmospherics, Borely University covers what every precision shooter needs to understand — beginner to competitor.

00 Day Zero — Start Here

Before the first shot, before the first match, before anything matters — there is preparation. This chapter is for every precision shooter, from first-time reloader to seasoned competitor. The habits you build in your first 100 rounds define the quality of every data point that follows.

Start Here
Day Zero — The Preparation Framework Every Precision Shooter Needs
In special forces doctrine, Day Zero is the day before the mission — when preparation happens. For precision shooters, it is the day you establish baselines before your barrel ever needs them.
Read article → Start Here
First 100 Rounds with Borely — Your Setup Guide
The most valuable data Borely will ever hold for your barrel is from your first 100 rounds. Here is exactly what to log, when, and why — session by session.
Read article → Start Here
The Five Numbers Every Precision Shooter Should Track
Muzzle velocity, ES, SD, CBTO drift, and round count. These five metrics together paint the complete picture of barrel health, load performance, and when action is required.
Read article →
01 Barrel Science

Understanding how your barrel wears, why round count matters, and how to read the signs of degradation before they cost you a match or a hunting season.

Barrel Science
How Barrels Wear — and Why Round Count Matters
The metallurgy of throat erosion, heat cycling, and why not all rounds are equal when it comes to barrel life.
Read article → Coming soon
Throat Erosion by Caliber — What to Expect
Real-world barrel life expectations for 6.5 Creedmoor, .308 Win, 300 PRC, 6mm variants, and more.
 Barrel Science
Why Borely Doesn’t Chart Velocity Trends
Borely logs velocity, ES, and SD with every session. Here’s why we don’t chart them — and what it would take for those charts to mean something.
Read article → Coming soon
Barrel Metallurgy — Stainless vs. Chrome Moly
How barrel steel composition affects wear rate, heat tolerance, and cleaning requirements.
02 Measuring Your Loads

Seating depth is one of the most powerful accuracy variables a reloader controls — and one of the most misunderstood. Learn why CBTO matters more than COAL, and how to measure it correctly every time.

Measuring
COAL vs. CBTO — Why One Matters More Than the Other
COAL measures tip to base, but bullets vary. CBTO measures ogive to base — a much more repeatable and meaningful measurement for seating depth.
Read article → Measuring
Comparators Explained — Relative, Not Absolute
Why a comparator reading is meaningless without knowing exactly which insert and caliper were used — and why changing tools corrupts your data.
Read article → Coming soon
How to Measure to the Lands — Three Methods Compared
The Hornady OAL gauge method, the fired case method, and the Davidson method — how each works and when to use which.
 Coming soon
Tracking Throat Erosion with CBTO — A Practical Guide
How to use Borely's CBTO readings to build a throat erosion baseline and project when your barrel will need retirement.
03 Atmospherics & External Ballistics

Air is not empty. Temperature, altitude, humidity, and wind each affect how your bullet flies — and your chronograph data. Understanding these variables turns session logs into actionable intelligence.

Atmospherics
Density Altitude — The Number That Matters More Than Elevation
Why a 5,000ft range on a hot day can produce the same ballistic conditions as an 8,000ft range on a cool one — and how to account for it.
Read article → Coming soon
Temperature and Powder Burn Rate
How ambient temperature changes your muzzle velocity, why some powders are more temperature sensitive than others, and what to expect across seasons.
 Coming soon
Wind Reading Basics for the Precision Shooter
Reading mirage, using range flags, and why recording wind conditions in your session log turns individual data points into a usable pattern.
 Coming soon
Humidity — Myth vs. Reality
The actual effect of humidity on bullet trajectory is smaller than most shooters think — but it does matter at extreme range. Here's the science.
04 Load Development

The systematic process of building an accurate, consistent load — and why tracking ES, SD, velocity, and seating depth together tells a story no single data point can.

Coming soon
Working Up a Load — The Process
From start charge to confirmed node: a methodical approach to load development that produces repeatable results and a clear data record.
 Coming soon
ES and SD — What the Numbers Actually Mean
Extreme Spread and Standard Deviation demystified. What targets to aim for, why they matter at distance, and how to track them over barrel life.
 Coming soon
Velocity Nodes — Finding and Confirming Them
What a velocity node is, why loads near a node are more forgiving, and how to identify them using your chronograph data.
 Coming soon
How Load Performance Changes Over Barrel Life
The same load that printed .3 MOA at 200 rounds may open up at 900. Here's how to use Borely's analytics to see it coming.
05 Maintenance & Care

How often you clean, how you clean, and what products you use all affect barrel longevity and consistency. The data on cleaning intervals might surprise you.

Coming soon
Cleaning Intervals — How Often Is Too Often
The science behind bore fouling and why over-cleaning can be as damaging as neglect. What the data says about optimal cleaning frequency.
 Coming soon
Carbon vs. Copper Fouling
Two completely different problems requiring different solutions. How to identify which you're dealing with and what to use to address each.
 Coming soon
Bore Scope Basics for the Precision Shooter
What to look for, what's normal, and what's a warning sign. A practical guide to bore scope inspection without the guesswork.
 Coming soon
Break-In Protocols — Do They Actually Work?
The data on barrel break-in is more nuanced than manufacturers admit. What's well-supported and what's mostly tradition.

Track what you learn.

Borely puts every concept from Borely University into practice — logging the data that turns knowledge into precision.

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