Bench 5

Powder

Charge every case to the same weight. Consistency here is the single biggest driver of velocity consistency downrange.

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New to reloading? Start with Basics only. · Already reloading? Use Basics as a refresher, then dig into Control and Tune.
Safety
!
Never double-charge a case

A double charge — two powder throws in one case — can cause catastrophic pressure. After charging each case, visually inspect the case mouth before moving on. With fast-burning pistol powders especially, a double charge may not be visually obvious. A loading block and single-pass workflow are your protection.

Note Loading block (keeps cases upright and visible)
!
Keep powder away from ignition sources

Store powder in its original container, away from heat, sparks, and open flame. Never smoke at the bench. Don't leave powder exposed in the measure overnight.

Basics
What you're doing and why
Every velocity extreme spread problem traces back to powder. Get the charge weight right, get it consistent, and most of your ES problems go away on their own.
1
Zero your scale

Before throwing any powder, zero your scale with no load on the pan. If you're using a beam scale, check it against a known reference weight. A scale that drifts between charges introduces error you can't see.

You'll need Powder scale (beam or electronic) + calibration weights
2
Set your powder measure

Adjust your measure until it's throwing within 0.1 grain of your target charge. Throw and weigh at least five consecutive charges before loading any cases — you're looking for the measure to settle, not just hit the number once.

You'll need Powder measure or trickler + scale
3
Charge and verify each case

Throw a charge, verify the weight, and pour it into the case. Work one case at a time. After charging, visually inspect the case mouths — all powder levels should look uniform. A high or low case is a flag before you ever seat a bullet.

Control
What you're controlling
Charge weight is your primary control variable. Everything else on this bench supports hitting it precisely and consistently. Tune Summary: Charge weight is the most direct tune lever you have. Small changes produce measurable velocity shifts — which is exactly why control comes first.
C1
Control Point 1
Charge Weight

Your target charge weight comes from load data. Record the exact weight you're working to — not a range, a number. If you're between two published loads, you chose one. Document which one and why.

You'll need Verified load data source
C2
Control Point 1
Powder Lot Number

Powder burns differently lot to lot. When you switch lots, treat it as a new load — re-verify your charge and watch your velocity data before assuming it's identical.

Tune
T1
Charge Weight as a Tune Variable

Increasing charge weight raises velocity — but not linearly, and not without limit. Small increments (0.2–0.3 grain) produce measurable shifts. Qual8 maps charge weight against velocity and ES so you can see where your load is on the pressure curve before you run out of margin.

Logbook Record Layer

- Powder brand, type, and lot number
- Target charge weight and actual average achieved
- Scale used and zero-check result
- Any charges flagged and re-thrown
- Bench date and session number

Bench walkthrough
Watch the bench in practice
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Bench 5
VIDEO COMING SOON
Powder charging walkthrough — trickler setup, scale zeroing, and charge weight verification
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