Starline 300 Blackout Brass, Factory New (Quantity of 50) NOT LOADED AMMO

This listing is for the Starline 300 Blackout Brass, Factory New (Quantity of 50) NOT LOADED AMMO. If you already know the category, skip to fitment; if not, start at the top.

Specifications

Type	Component Projectiles For Reloading
SKU	SL300BLKB
Price	$17.50

How a projectile works

These are projectiles only, not loaded ammunition. They are intended for handloaders who want control over powder charge, seating depth and velocity that factory ammunition cannot give.

What to check before ordering

Match the projectile diameter to your bore and the weight to your twist rate. Published load data for the exact projectile is essential; substituting a different bullet of the same weight is how pressure events happen.

Value

At $17.50 this sits at the affordable end of the category. That usually means simpler materials or a fixed mount rather than a compromise on function.

Delivery

This ships directly to you. See our shipping and delivery page for processing times, carriers and any restrictions that apply to your address.

Maintenance

Keep it clean and dry, check fasteners periodically against the manufacturer’s torque figures, and inspect wear surfaces before you rely on it.

See also

Browse our suppressor range, 8.6 Blackout ammunition and 300 Blackout ammunition, or work out what your setup actually delivers with the ballistics calculator.

Colour and coating

A plain black finish is the most durable and the easiest to touch up, and it hides oil and carbon rather than showing it.

Weight and finish are unrelated, despite marketing. Coating adds a negligible amount either way.

Fitting

Blue threadlocker on non structural fasteners saves headaches. Avoid the permanent grade on anything you may want to remove.

Practical notes

Use published load data for the specific projectile. Substituting a different bullet of the same weight is a genuine pressure risk, not a theoretical one.

Start low and work up. Every rifle is its own pressure system, and published maximums are not targets.

Commonly overlooked

Monolithic copper projectiles usually need different seating and charge data from lead core bullets of the same weight, because they are longer.

Keep records. A load that worked last season is only reproducible if you wrote down what it was.

Points people miss

These are components, not loaded ammunition. They are for handloaders who want control over charge weight, seating depth and velocity.

Batch consistency is what handloading buys you. Sort by weight and measure runout if the goal is small groups.

Monolithic copper projectiles usually need different seating and charge data from lead core bullets of the same weight, because they are longer.

Frequently asked questions

Is this in stock at this price?

Yes, $17.50 is the current price and this is held stock. Prices move with supply, so the listing is the authority rather than a cached search result.

What thread pitch do I need?

That depends on your host firearm rather than on this item alone. If you tell us the rifle, we can confirm compatibility before you commit.

Do you ship internationally?

No. We ship within the United States only, subject to state and local restriction.

Will this fit my action?

Check the inlet or interface specification against your action before ordering, and ask us if you are unsure.

Do I need threadlocker?

Blue grade on non structural fasteners is sensible. Avoid permanent grades on anything you may need to remove.

Does it come assembled?

Check the listing specification. Where assembly is required, follow the manufacturer’s torque figures rather than improvising.

What is the return position?

Returns are covered on our returns page. Components fitted or modified cannot usually be returned, which is the normal position across the industry.

Do you price match?

Ask. We would rather have the conversation than lose the sale over a figure.

Is there a warranty?

Manufacturer warranty applies. Terms vary by brand, so check the maker’s policy for the specific item.