General Gunsmith ToolsA-ZoomSold by Brownells

A-Zoom

Rimfire Dummy Rounds - 17 Mach 2 Action Proving Rounds 6/Pack

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Inert, Factory-spec

Dummy rounds for safe function

Made Exact

Diameter and length dimensions

Matches Factory-loaded

Ammo weight and balance

Helps Check

Magazine feeding, action timing, extraction,

Blackened Case

Makes each round instantly recognizable

$11.99
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SKU: 187000034

Overview

These inert, factory-spec dummy rounds are designed for safe function testing before live fire. They are intended to help check magazine feeding, action timing, extraction, and ejection, making them useful for routine verification of firearm operation and for use as a sales aid. The blackened case helps them stand out clearly as dummies, reducing the chance of confusion with live ammunition. Sold in a 6-pack, they provide a practical option for shooters who want a dedicated tool for checking function without using live rounds.

Why Hunters Choose the A-Zoom

Inert, Factory-spec

Dummies support safe function testing

Made Exact

Diameter and length dimensions

Matches Factory-loaded

Ammo weight and balance

Helps Check

Magazine feeding, action timing, extraction,

Blackened Case

Makes each round instantly recognizable

Key Features

  • Inert, factory-spec dummy rounds for safe function testing
  • Made to exact diameter and length dimensions
  • Matches factory-loaded ammo weight and balance
  • Helps check magazine feeding, action timing, extraction, and ejection
  • Blackened case makes each round instantly recognizable as a dummy
  • Pack includes 6 rounds

Best Used For

  • Hunters verifying magazine feeding and action timing before range use
  • Gunsmiths and shop staff checking extraction and ejection safely
  • Retail sales demonstrations where inert rounds must be instantly recognizable
  • Owners of 17 Mach 2 firearms needing factory-spec dummy rounds for function checks

Specifications

Caliber17 Mach 2
Case ColorBlackened
Manufactured To Exact Specificationstrue
PurposeCheck magazine feeding, action timing, extraction, and ejection
Quantity6/Pack
Safe Use NoteLive ammo should never be used except in actual test-firing on the range after checking the gun with dummies
Sales Aid UseIdeal and safe to use as a sales aid
TypeDummy Rounds

Pros

  • Inert, factory-spec dummies support safe function testing
  • Made to exact diameter and length dimensions
  • Matches factory-loaded ammo weight and balance
  • Helps check magazine feeding, action timing, extraction, and ejection
  • Blackened case makes each round instantly recognizable as a dummy
  • Six-round pack offers a practical quantity for routine checks

Considerations & Trade-offs

  • Sold in a 6-pack, so it’s best suited to occasional function checks rather than high-volume training or repeated shop use.
  • These are inert dummy rounds intended for safe function testing; they are not a substitute for live-fire verification at the range.
  • The blackened case is designed to make them instantly recognizable as dummies, which is useful for safety but means they are not meant to resemble live ammunition in appearance.
  • Sized for 17 Mach 2 only, so they are limited to that specific chambering and won’t serve as a general-purpose dummy round option.

Suggested Comparisons

  • Rimfire snap caps and dummy rounds
  • Gun cleaning and maintenance accessories
  • Magazine and feeding function test tools
  • Range safety and training aids

Suggested Accessories

  • Rimfire ammunition storage box
  • Cleaning rod
  • Gun vise
  • Dry-fire training aid

Frequently Asked Questions

What are these 17 Mach 2 dummy rounds used for?

They are inert, factory-spec dummies intended for safe function testing. The product description says they can be used to check magazine feeding, action timing, extraction, and ejection.

Can these be used instead of live ammunition for checking a firearm?

Yes, for function checking they are described as the professionally accepted and safe option. The description also states that live ammo should never be used except in actual test-firing on the range after the gun has been checked with dummies.

How many dummy rounds are included in the pack?

This product is sold as a 6-pack.

Are these rounds clearly identifiable as dummies?

Yes. The description says the case is blackened so the rounds are distinct and instantly recognizable as dummies.

Do these dummy rounds match factory ammunition dimensions?

According to the description, they are manufactured to exact specifications, including diameter and length dimensions, as well as weight and balance of factory loaded ammo.