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Inside Dial Caliper
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$147.99
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SKU: 100002230
Overview
This precision inside dial caliper is built for measuring internal dimensions in the shop, including chambers, choke tubes, bores, and similar openings. Its easy-to-read dial is graduated from .375" to 1.375" with .001" accuracy, and the bezel locking screw allows zeroing for comparative measurements. A side push-button closes the arms for insertion, while ball bearing contact points help produce repeatable readings. With an aluminum housing and steel arms, it is a practical measuring tool for gunsmiths who need controlled, inside-dimension checks.
Why Hunters Choose the Brownells
Measures Inside
Dimensions for barrels, choke tubes,
Dial Is
Graduated for .375" to 1.375"
Bezel Locking
Screw allows zeroing for comparative
Push-button Design
Closes the arms for easier
Ball Bearing
Contact points are described as
Key Features
- Precision inside dial caliper for measuring chambers, choke tubes, bores, and other internal dimensions.
- Easy-to-read dial is graduated for measurements from .375" to 1.375".
- Provides .001" accuracy for detailed gunsmith measurements.
- Bezel locking screw allows zeroing for comparative measurements.
- Push-button closes the caliper arms for insertion into the area being measured.
- Ball bearing contact points are designed to deliver repeatable measurements.
Best Used For
- Gunsmiths measuring chambers, bores, and choke tubes in a shop setting
- Hunters checking inside dimensions where precise comparative measurements matter
- Users needing repeatable measurements across barrels and other internal firearm parts
- Bench work requiring a dial caliper with easy-to-read thousandth-inch readings
Specifications
| Accuracy | 0.001" |
|---|---|
| Application | Accurately measures inside dimensions of barrels, choke tubes, bores, chambers, and other inside dimensions |
| Arm Material | Steel |
| Ball Bearing Contact Points | Yes |
| Bezel Locking Screw | Yes |
| Dial Diameter | 2" (5 cm) |
| Dial Range | 0.375" to 1.375" |
| Housing Material | Aluminum |
| Measurement Type | Inside dial caliper |
| Micrometer Range | 0.375" to 1.375" |
| Needle Indicators | Small needle measures tenths of an inch; large needle records thousandths |
| Overall Length | 5.3" (13.6 cm) |
| Push Button Closure | Yes |
| Revolution Value | 0.200" |
Pros
- Measures inside dimensions for barrels, choke tubes, bores, and other internal areas
- Dial is graduated for .375" to 1.375" measurements with .001" accuracy
- Bezel locking screw allows zeroing for comparative measurements
- Push-button design closes the arms for easier insertion into measured areas
- Ball bearing contact points are described as delivering repeatable measurements
- Aluminum housing with steel arms provides a durable shop-ready construction
Considerations & Trade-offs
- Measurement range is limited to .375"–1.375", so it is suited to smaller inside dimensions rather than broader shop use.
- The dial reads in thousandths with tenths indicated by the small needle, which is precise but may take a moment to interpret quickly.
- It is a manual measuring tool, so results depend on careful setup and consistent handling rather than instant digital readout.
- The aluminum housing and steel arms suggest a shop-focused tool, but it is not described as a general-purpose caliper for all measurement tasks.
Suggested Comparisons
- Gunsmith measuring tools
- Dial calipers
- Bore and chamber measurement tools
- Choke tube measurement tools
Suggested Accessories
- Gunsmithing tools
- Cleaning rod guide
- Bore light
- Measuring tools
Frequently Asked Questions
What inside measurements can this caliper handle?
The stated micrometer range is .375" to 1.375", which covers inside dimensions such as barrels, choke tubes, bores, chambers, and other similar gun-shop measurements.
How precise is the reading?
The product description states .001" accuracy. It also notes that the small needle measures tenths of an inch and the large needle records thousandths.
Can it be zeroed for comparison work?
Yes. The dial has a bezel locking screw that lets you set zero for comparative measurements.
How do you use it in a tight bore or chamber?
The caliper has a push-button on the side that closes the arms so it can be inserted into the area to be measured, then the ball bearing contact points are used to take the reading.
What materials are listed for this caliper?
The provided specifications list an aluminum housing and steel arms. No other material details are given.