Silverback 9mm 135gr Solid Copper Subsonic Expanding Projectiles (Qty 50)

What this is

This is the Silverback 9mm 135gr Solid Copper Subsonic Expanding Projectiles (Qty 50).

This is the 135gr Silverback solid copper projectile for 9mm, purpose-built for subsonic loads, sold bare as a reloading component. If you are loading 9mm to stay under the speed of sound, for a suppressor or for reduced report, this is the design built around that specific problem rather than a standard hollow point loaded down and hoped to work.

Why subsonic 9mm needs a different bullet

A standard hollow point relies on impact velocity to drive expansion, generally needing somewhere north of 900 to 950 fps. Subsonic 9mm loads sit around 1000 to 1050 fps or below by definition, close enough to that threshold that a standard design’s expansion becomes unreliable, sometimes it opens, sometimes it punches a straight hole like ball ammunition. This projectile’s hollow-point geometry and copper alloy are built specifically to trigger expansion at that lower velocity band instead of assuming full-power impact speed.

Why 135gr specifically

Going heavier than the standard 115gr weight helps two things at once for a subsonic load: it carries more momentum and retained energy at low velocity, which partly offsets the energy a slower bullet inherently loses, and the added mass gives the powder charge more to push against, which makes it easier to tune a load into the subsonic window with a wider range of usable powders.

How this differs from our standard 115gr

If you are loading full-power or +P 9mm through a normal barrel length, our standard 115gr expanding design is the better fit, it is built around full-power impact velocity and this subsonic-rated bullet is not necessary there. Use this 135gr for anything you are deliberately loading down or building for a suppressor.

Frequently asked questions

Will this expand out of a short-barrel pistol? Yes, that is the specific problem this design solves, expansion at the lower velocity a subsonic or short-barrel 9mm load produces.

What powder charge should I start with? Start at the published starting load for this exact bullet, and work toward subsonic velocity (roughly 1000 to 1050 fps or below) using a chronograph, not a book number alone.

Is the subsonic version loaded to a specific velocity? No, this is a component, not loaded ammunition. Final velocity depends on your powder charge and barrel length; the design simply ensures expansion works at subsonic speeds once you get there.

Related reading: 8.6 Blackout ammunition, 300 Blackout ammunition, or the ballistics calculator. Reference: SAAMI standards.

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