Powder

Powder inventory tracks how many grains of each powder you have on hand and what you paid per pound. When you log a batch, the grains used are deducted automatically based on your charge weight and round count.

Adding powder inventory

Go to Inventory and open the Powder page. Adding inventory requires selecting a powder from the catalog and entering a quantity in grains. Optionally you can record a lot number, cost per pound, a purchase date, and any notes. Each entry always creates a new row, so you can track multiple purchases of the same powder with separate quantities and costs.

Cost is entered as dollars per pound, not per grain. The app stores this as a per-pound figure and uses it to calculate cost per round when you log a batch.

If the powder you use is not in the global catalog, you can add a private entry inline from the add form. A private powder entry requires brand and name. See Component catalog for how global and private entries work.

Quantity in grains

Powder is stored and displayed in grains throughout the app. One pound equals 7,000 grains. If you buy a one-pound jug, enter 7000. If you have a partial jug, weigh it and enter the grain weight directly.

Batch deduction

When you log a batch, powder is reduced by charge weight multiplied by the number of rounds loaded. A batch of 100 rounds at 42.5 grains deducts 4,250 grains. If you have one lot on hand for the powder the batch uses, the deduction happens automatically with no selection needed. If you have more than one lot, a lot selector appears on the batch form so you can choose which lot to deduct from. The lot you pick also determines the per-powder cost used in the cost-per-round snapshot stored on the batch.

Powder type

Global catalog entries include a powder type where the data is known: ball, flake, extruded, or tubular. This describes the physical form of the propellant grain, not its burning rate or pressure curve.

• Ball: spherical grains. Common in pistol and some rifle loads. Examples: Hodgdon H110, Winchester 231, all Ramshot powders.
• Flake: flat disc-shaped grains. Common in fast-burning pistol and shotgun powders. Examples: Alliant Unique, Hodgdon Clays, IMR Hi-Skor 700-X.
• Extruded: solid cylindrical sticks. Common in rifle powders. Examples: Hodgdon Varget, IMR 4350, Vihtavuori N140, all Norma powders.
• Tubular: hollow cylindrical grains. Not currently used in the global catalog.

Powder type is informational. It does not affect batch deductions, cost calculations, or recipe validation.

User-private powder entries do not have a powder type assigned.

Cost per round

If you recorded a cost per pound when you added inventory, the app calculates a cost-per-round for each batch at the time the batch is logged. The formula is: cost per pound divided by 7,000, multiplied by the charge weight in grains. This figure is stored on the batch and used in cost-per-round analytics.