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SINCLAIR INTERNATIONAL
SINCLAIR BUMP GAGE INSERT

050806111189 749011471

Description
Ratings (17)

Sinclair Bump Gage Inserts are used to measure the amount of shoulder bump when setting up full length sizing dies. Our Bump Gages install in either of our comparator bodies and are machined to fit particular shoulder angles of cartridges. Rather than measuring to the datum line, these gages indicate off of the shoulder of the case to get a better, more easily assessable measurement of how much you are actually sizing your cases. We usually recommend between .001" to .002" bump for bolt action rifles and between .003" and .005" for AR-15 type rifles. Also a useful tool for keeping your brass and loaded ammunition separated if you have multiple rifles chambered for the same cartridge and checking loaded ammunition.

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Customer ratings for SINCLAIR INTERNATIONAL #21 21° SHOULDER BUMP GAGE INSERT

Number of ratings: 17
From brownells.com: 17
Average rating: 3.1

Keep it simple (09/02/2011)

Simplicity is more often than not the best way to do things...This product is so simple but is something every shooter should have at their reloading bench.
Use it every few hundred rounds to make sure your desired bullet jump matches wear in barrel.

Great tool for measuring bullets/cases (13/12/2013)

I bought this tool in order to measure bullets from the ojive to the base and also to measure should bump. It's a high quality tool and works perfectly for my needs. Being that it's the XL version, you're able to measure shoulders with a bullets installed.

Only works with certain calipers (13/12/2016)

We use Aero Space brand calipers at the EPA. The slot on these arent wide enough to fit over them. That's OK but Sinclair should list some models they work with OR the width of the slot.

Much Better than Hornady LNL inserts (23/02/2011)

It's much easier to measure headspace with an insert that's tapered to match the cartridge's shoulder angle. Easier to use than the 90 deg. edge of the straight hole drilled in the original Hornady LNL inserts.

Does not work for 6.5 Creedmoor (24/07/2018)

Bought this 30A to check bumping the shoulders of my 6.5 Creedmoor brass. Had been using a Wilson Case gage to do the job and it works well I thought this may be faster. I bumped and bumped no reading beyond the initial cal of 1.501 on the digital calipers. Each bump i got a new reading on the Wilson Case Gage. Highly disappointed with the purchase.

Incorrect fitment (24/02/2018)

The details on this part say this fits 300 Blackout. Turns out it doesn't unless you modify it does not explain that anywhere in the description.

Poor / Inaccurate Description (03/03/2018)

Does NOT fit 300 Blackout without modification.

Does not work for .416 Rigby (25/01/2015)

The .416 Rigby is a beltless cartridge that headspaces on its ample 45 degree shoulder. This bump gage hole diameter is too small to host the outside dimensions of the .416 Rigby brass. It would have been nice to know there was a size limit on the exterior brass dimensions so as to avoid a return.

Quality (20/06/2018)

I have the original Stoney Point tool and this fits and works well on .338 Lapua Magnum cases to adjust the amount of shoulder bump on cases.

Great tool for measuring shoulder bump (13/12/2013)

I bought this tool to use with the Sinclair XL Comparator body and it works great! I am able to measure the distance between the should and the base of a fire cartridge and then set my sizing die to bump the shoulder back a certain distance. I would definitely buy this tool again.

Poor discription (02/07/2012)

It's listed as "30-06 Family" but will not work with 17deg shoulders over 338 cal.

These Fit the Hornady Tools (07/01/2015)

This little item told me right away what problem My sons hand loads had very easy to use and the fact they fit the Hornady tools that look like this is a big plus....If you already have the Hornady gauges.

great product (01/03/2016)

I really like the insert it's made of Stainless Steel so it will not wear easy . The gauge is also very easy to use, works on my Hornady body too.

Nicely machined doesnât fit without mods (18/04/2018)

Iâm using this to measure shoulder bump between fired and full length sized cases. The âthrough holeâ is much too tight on all the 223 fires cases Iâve tried, this leads to cases sticking and readings of .010+ greater than normal. I can neck size to get them to fit but this is an additional step that Iâd prefer not to do, and is impossible to accomplish if Iâm trying to get data while on the range. I asked Sinclairâs techs if there was an issue with the product and they told me to ream it out with a drill bit. Not exactly the answer I was looking for. I would like to keep using this product because I like that the opening matches up with the shoulder angle unlike competing products, but it doesnât work out of the box.

Requires honing geometry change (24/01/2014)

The tapered opening is right at .277 and goes extremely far down VLD type/Accubond bullets, this makes it impossible to measure Ogive Combined Overall Length on loaded bullets. The older stainless steel hexagonal shaped comparator is much more useful as it's tapered opening is at .268". This comparator insert's tapered opening should start at .270" within .001" of that.

Quality Construction (18/07/2016)

The bump gauge/comparator body has quality construction, and hold the inserts well. They attach to my calipers securely, and work well.

Feels Like Plastic (26/01/2017)

I thought the product was made of metal, which is should be. Feels like plastic, which it should not be. I didn't have much luck with this product and the inserts using it as a bump gauge. The readings were inconsistent even with two different calipers. Even trying to bump .308 cases back 4/1000ths for an AR10 was nearly impossible to do with any consistency. The finished products did not shoot as well as a fully resized cases in the testing I did.

Read 17 more ratings on brownells.com

14.9 21.9 15 GBP

Product no.: 749011471
SINCLAIR INTERNATIONAL #21 21° SHOULDER BUMP GAGE INSERT
Mfr Part: 0910210 050806111189 Sinclair Bump Gage Insert, 220 Swift, 21\

15.9 GBP 0 £15.90 *

Backordered, delivery time approx. 4-12 weeks from the USA warehouse.

Specs: Cartridge: 220 Swift

SINCLAIR INTERNATIONAL SINCLAIR BUMP GAGE INSERT

Customer ratings for SINCLAIR INTERNATIONAL #21 21° SHOULDER BUMP GAGE INSERT

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Customer ratings for SINCLAIR INTERNATIONAL #21 21° SHOULDER BUMP GAGE INSERT

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SINCLAIR INTERNATIONAL
SINCLAIR BUMP GAGE INSERT