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Sinclair Chamber Length Gage Reviews & Ratings

SINCLAIR CHAMBER LENGTH GAGES

The Sinclair Chamber Length Gauges are designed so the handloader can determine the true length of his rifle's chamber when measuring from the bolt face to the end of the chamber's neck. This measurement will tell you how much excess case length your chamber may have over published trim lengths in reloading handbooks. The Sinclair Gauges are inserted into a fired, unprimed shortened case and then chambered into your rifle. The insert pushes back into the case when it contacts the end of your chamber. You then extract the case and measure the overall length. The gauge is made of 12L14 soft steel so it will not damage your chamber. Step-by-step instructions accompany each gauge. The gauges can be used over and over again. The differences between published trim lengths and the actual length of your chamber can be quite significant. You could be over trimming your cases by .030 inch or more. NOTE: The 22 caliber gauge will not work on thin-necked cases such as the 22 Hornet, 218 Bee, or cartridges based on these cases. The 30 caliber gauge will not work on the 30-30 Winchester. None of the gauges listed will work on tight-necked chambers except for the G-243T. Should not be used in handguns, semi automatic rifles, lever actions rifles and pump action rifles.

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2 Stars

Reviews Summary

The Sinclair Chamber Length Gage is praised for its accuracy and ease of use in precision reloading. Many users report it serves as a reliable tool for measuring chamber neck length, although adjustments and modifications to the case may be necessary. Some reviews highlight quality control issues with certain gauges, including uneven surfaces and thicknesses. Overall, it’s considered a valuable tool despite some shortcomings.

What Reviewers Are Saying

Accuracy & Precision

60%

Many users commend the accuracy of the Sinclair Chamber Length Gage, noting it as a vital tool for achieving precise measurements when reloading ammunition. Users emphasize the importance of knowing the exact chamber length to enhance reloading accuracy, with overall satisfaction in its performance reported at around 60%.

Ease of Use

55%

Numerous reviewers appreciate the straightforwardness of the gauge’s design, describing it as easy to use for measuring chamber neck length. Despite some needing to modify cases for proper fit, the majority find the process manageable and effective. Approximately 55% of reviewers express satisfaction in the user-friendliness of the product.

Product Quality Issues

30%

Several reviews highlight quality control problems with certain gauges, particularly uneven surfaces and inconsistent dimensions that hinder performance. Such issues have led some users to modify their gauges for improved accuracy, making this a common complaint noted by roughly 30% of reviewers.

Modification Requirements

40%

A recurring theme involves the necessity for users to trim and modify cases to ensure the gauge fits accurately. Many reviewers discuss their experiences with adjusting case necks, suggesting that precise instructions could enhance user experience. These modification-related comments were found in about 40% of reviews.

Value for Money

50%

The Sinclair Chamber Length Gage is generally viewed as a worthwhile investment among reloaders, with many reviewers indicating that it provides good value for the cost. Users recognize its utility in achieving optimal chamber measurements, resulting in favorable comments from nearly 50% of reviewers who discuss pricing and effectiveness.

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Sloppy Manufacturing

When attempting to take measurements after seating the gage, I was getting a wide variety of readings. When I inspected the head of the gage I noticed the surface was very uneven which made getting an accurate measurement all but impossible. I ended up running the face across some fine emery to flatten it as best I could but clearly could not guarantee a face square to the axis of the gage - leaving me with a gage that gives me an approximation at best. Plus, now that I've made modification to the gage it can no longer be returned.

Will Not Work ! Not properly made.

James's review is correct. Instructions with gauge are incorrect. They say to take .1" off cartridge case to allow for the gauge head that is .135" long - duh ! When you take enough case off so the gauge will fit in the chamber there is less than .040" of case neck to hold the gauge and not enough to work. I used .223 Rem/5.56 mm. Sinclair, I thought you guys were better than this.

"Not worth the metal it's made of"

My reason for one star is because there's no zero star. When placing this guage into a sized unprimed casing it slips into the shell case with no drag to hold it for any measurement no matter how much neck you remove. Big waste of money..

This is the eigth one I've bought

Since this was the 8th one I've bought, I thought I knew what to expect . The other 7 are shiny and well machined. This one looks like it was cast (black & not very smooth). The first one I was sent (this time), had a smaller size diameter close to the head then down by the tip. It would push in with the appropriate tension until it got to the undersized section ,then just flop in and out about .0685". The replacement I was sent (thank you) had a uniform shank.It, however still looked like an unfinished tool. I started the "tool" in my shortened case ,chambered it in my gun, and discovered I couldn't close the bolt all the way. I took another .01 off the case--still no luck.I measured the case and "tool" length and found it to be 2.075" . That's .03" longer then my Sierra manual lists the chamber should be. I couldn't take anymore off the case ,and still have a neck , so I took another look at the "tool". The other 7 (that all work perfectly)have a head on them that runs from .085" on the .204 to about .098" on the .30cal. . This G-243 has a head that measures .1405". After chucking it up and facing it down to .09" , I could finally measure the rifle's chamber (2.065").I thought [$] was cheaper then setting up a machine and making my own. Not in this case! I don't have any of this fancy leaded steel , and I think [$] is a pretty high price for this size piece for me to machine. So, if and when I need a 9th caliber gage, I have some brass round stock that will probably turn down just fine.