SKU: 749002933
UPC: 050806111547
The #2 Hex Style Bullet Comparator from Sinclair International is a bench tool for handloaders who measure to the ogive instead of the bullet tip. It covers the 17 through 338 caliber range in a single hex body, giving you a repeatable reference point for measuring cartridge overall length where it actually matters. Tip-to-base measurements vary with meplat shape and lot, which throws off seating consistency. Reading off the ogive instead removes that error. Anyone chasing tighter groups, working up loads, or sorting bullets for a precision rifle build will use this on nearly every reloading session.
The hex design holds multiple caliber bores in one block, so a single comparator handles the bulk of common rifle calibers from .17 to .338 without swapping inserts loose on the bench. Each bore contacts the bullet at the ogive datum, the same point the rifling first engages, which is why ogive-based comparator readings track chamber fit more closely than overall length measured to the tip. The body threads or clamps onto standard caliper jaws, turning your existing dial or digital caliper into a comparator gauge. Pair it with one of our digital calipers for fast, consistent readings, and use it alongside a precision headspace mic when dialing in shoulder bump on bottleneck cases.
Reach for this comparator when you're seating bullets to a target distance off the lands, comparing bullet lots for length consistency, or verifying that a new die setup produces uniform rounds. Sorting bullets by ogive before loading is one of the cheapest ways to shrink group size on a precision rifle, and this hex tool makes that sorting quick across most of your calibers. Add it to a bench that already runs quality measuring tools and the right rifle dies, and you've got the measurement chain covered from sizing through final seating.
The #2 hex body covers the 17 through 338 caliber range, handling most common rifle calibers in a single block. That spread takes care of the bulk of what a typical precision shooter loads, from small varmint rounds up through standard magnums.
Bullet tips vary in length from lot to lot because of meplat shape and trimming. The ogive is where the bullet contacts the rifling, so measuring there gives a far more consistent reference for seating depth and overall cartridge length than reading to the tip.
Yes. The hex comparator mounts to standard caliper jaws, so any dial or digital caliper becomes a comparator gauge. You read the distance from the case head to the ogive datum, then adjust seating depth to keep that number consistent across a batch.
Sorting bullets by ogive length and seating to a consistent ogive-to-lands distance removes a major source of velocity and seating variation. For precision rifle loads, that uniformity is one of the most cost-effective ways to tighten groups before chasing other variables.
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