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This Sinclair Comparator is an excellent tool to use to sort bullets by base to give length. This is a valuable step if you are considering trimming the bullet meplat. NOTE: When sorting a lot of bullets, a digital caliper is sometimes a better choice for some handloaders than a dial caliper (digital calipers listed below). An alternative tool to use for sorting bullets is our Sinclair Bullet Sorting Stand (#59-2000) which uses its own unique comparators.

Our Sinclair Bullet Comparator attaches to the blade of your caliper and uses inserts for each specific caliber. The inserts are stainless steel and machined with a taper and a short straight section to more accurately duplicate the chamber throat. This eliminates the wobble experienced with many comparators which have standard drilled holes. Our design allows you to quickly and accurately measure the bullet's bearing surface of the bullet. Comparator inserts are available in 17 thru 45 caliber, and they can be used in both the Sinclair and older Stoney Point comparator bodies. These inserts are not intended to measure rounds seated to magazine length or shorter. For this application please see our Sinclair Bullet Comparators (#09-600 and #09-700). 


Big Book Catalog, Issue:68, Page:531
Big Book Catalog, Issue:68, Page:532
Sinclair, Issue:5B, Page:027
Sinclair, Issue:5B, Page:034

Filtered Matches

SINCLAIR COMPARATOR INSERT/44 CAL
749-011-511WB
44 Caliber (.429") Comparator Insert
74901151144 Caliber (.429") Comparator Insert

Mfr Part: 090429

$7.99

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In Stock

Caliber: 44 Caliber (.429-.430)

Other Matches

SINCLAIR COMPARATOR/BUMP GAGE BODY
749-002-552WB
Bullet Comparator & Bump Gage Body
749002552Bullet Comparator & Bump Gage Body

Mfr Part: 091000

$15.99

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In Stock

Caliber: Universal

XL COMPARATOR/BUMP GAGE BODY
749-011-959WB
XL Bullet Comparator & Bump Gage Body
749011959XL Bullet Comparator & Bump Gage Body

$15.99

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SINCLAIR COMPARATOR INSERT/17 CAL
749-000-924WB
17 Caliber (.172") Comparator Insert
74900092417 Caliber (.172") Comparator Insert

Mfr Part: 090172

$7.99

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In Stock

Caliber: 17 Caliber (.172)

SINCLAIR COMPARATOR INSERT/20 CAL
749-000-927WB
20 Caliber (.204") Comparator Insert
74900092720 Caliber (.204") Comparator Insert

Mfr Part: 090204

$7.99

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In Stock

Caliber: 20 Caliber (.204)

SINCLAIR COMPARATOR INSERT/22 CAL
749-000-928WB
22 Caliber (.224) Comparator Insert
74900092822 Caliber (.224) Comparator Insert

Mfr Part: 090224

$7.99

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Caliber: 22 Caliber (.223-.224)

SINCLAIR COMPARATOR INSERT/6 MM
749-000-929WB
6mm (.243") Comparator Insert
7490009296mm (.243") Comparator Insert

Mfr Part: 090243

$7.99

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Caliber: 243/6 mm (.243)

SINCLAIR COMPARATOR INSERT/25 CAL
749-000-922WB
25 Caliber (.257") Comparator Insert
74900092225 Caliber (.257") Comparator Insert

Mfr Part: 090257

$7.99

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In Stock

Caliber: 25 Caliber (.257)

SINCLAIR COMPARATOR INSERT/6.5 MM
749-000-930WB
6.5mm (.264") Comparator Insert
7490009306.5mm (.264") Comparator Insert

Mfr Part: 090264

$7.99

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Caliber: 264/6.5 mm (.264)

SINCLAIR COMPARATOR INSERT/270 CAL
749-000-923WB
Sinclair Comparator Insert, 277 cal
749000923Sinclair Comparator Insert, 277 cal

Mfr Part: 090277

$7.99

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Caliber: 270/6.8 mm (.277)

SINCLAIR COMPARATOR INSERT/7 MM
749-000-925WB
7mm (.284") Comparator Insert
7490009257mm (.284") Comparator Insert

Mfr Part: 090284

$7.99

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Caliber: 284/7 mm (.284)

SINCLAIR COMPARATOR INSERT/30 CAL
749-000-931WB
30 Caliber (.308") Comparator Insert
74900093130 Caliber (.308") Comparator Insert

Mfr Part: 090308

$7.99

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In Stock

Caliber: 30 Caliber (.308)

SINCLAIR COMPARATOR INSERT/8MM
749-000-919WB
8mm (.323") Comparator Insert
7490009198mm (.323") Comparator Insert

Mfr Part: 090323

$7.99

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In Stock

Caliber: 8 mm (.323)

SINCLAIR COMPARATOR INSERT/338 CAL
749-000-926WB
338 Caliber (.338") Comparator Insert
749000926338 Caliber (.338") Comparator Insert

Mfr Part: 090338

$7.99

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In Stock

Caliber: 338 Caliber (.338)

SINCLAIR COMPARATOR INSERT/35 CAL
749-000-920WB
Sinclair Comparator Insert, 35 cal
749000920Sinclair Comparator Insert, 35 cal

Mfr Part: 090358

$7.99

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In Stock

Caliber: 35 Caliber (.358)

SINCLAIR COMPARATOR INSERT/9.3MM
749-011-512WB
Sinclair Comparator Insert, 9.3mm
749011512Sinclair Comparator Insert, 9.3mm

Mfr Part: 090366

$7.99

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In Stock

Caliber: 9.3 mm (.366)

SINCLAIR COMPARATOR INSERT/375 CAL
749-000-917WB
375 Caliber (.375") Comparator Insert
749000917375 Caliber (.375") Comparator Insert

Mfr Part: 090375

$7.99

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In Stock

Caliber: 375 Caliber (.375)

SINCLAIR COMPARATOR INSERT/408 CAL
749-011-510WB
Sinclair Comparator Insert, 408 cal
749011510Sinclair Comparator Insert, 408 cal

Mfr Part: 090408

$7.99

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In Stock

Caliber: 408 Cheytec (.408)

SINCLAIR COMPARATOR INSERT/416 CAL
749-000-918WB
Sinclair Comparator Insert, 416 cal
749000918Sinclair Comparator Insert, 416 cal

Mfr Part: 090416

$7.99

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In Stock

Caliber: 416 Caliber (.416)

SINCLAIR COMPARATOR INSERT/404 JEFFREY
749-009-372WB
404 Jeffrey (.423") Comparator Insert
749009372404 Jeffrey (.423") Comparator Insert

Mfr Part: 090422

$7.99

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In Stock

Caliber: 404 Jeffery (.422-.423)

SINCLAIR COMPARATOR INSERT/.458 CAL
749-000-921WB
Sinclair Comparator Insert, .458 Cal
749000921Sinclair Comparator Insert, .458 Cal

Mfr Part: 090458

$7.99

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In Stock

Caliber: 45 Caliber (.451-.454)

SINCLAIR INSERT STYLE BULLET COMPARATOR