TECHNIQUES TO IMPROVE ACCURACY
There are many ways to bring out the best in your firearm, by handloading, and we will cover some of the more important ones during the net. Time constraints will mostly limit the discussion to rifles (although many of these techniques can apply to handguns) and we will gear it primarily to hunting and target shooting uses. The bench rest guys use a lot of these techniques, and more, but that is a discussion for another net.
If accuracy is your goal, handloading is but one factor in that department. There are many other considerations, such as the rifle action, the barrel, a proper fitting stock, optics, barrel bedding, and more. When all is said and done, all of these things are worthless without the final factor -practice, practice and more practice. All have to be considered to get the most potential from your firearm. The reward when everything falls into place is satisfying!!!
So, getting back to the handloading discussion, I have found Sinclair International handloading products to be of the highest quality. With the exception of #6, below, all of the following products are made by Sinclair International and can be found on the Sinclair website (
http://www.sinclairintl.com/). You should know that all of the Sinclair products are made in the USA! We will discuss these tools during the net and the effect that they can have on accuracy. I am numbering them for reference during the net.
1. Sinclair Primer Pocket Uniformer
Consistency requires uniformity in as many respects as possible. The primer pocket is a good starting point. The description and image below are from the Sinclair website (
http://www.sinclairintl.com/reloading-e ... 63189.aspx)
The Sinclair 8000 Series Uniformers are precision ground from one solidpiece of tungsten carbide, so there is no need to worry about changing thedepth of cut. These cutters will cut the primer pocket to a uniform depth and also square the bottom of the pocket in relationship to the case head.

- Sinclair Primer Pocket Uniformer.jpg (14.37 KiB) Viewed 3044 times
2. Sinclair Case Neck Turning Tool
Irregularities in the thickness of the case neck will result in bullet misalignment with the case body. Uniformity here, as elsewhere will contribute to accuracy. The product description and image are from the Sinclair website (
http://www.sinclairintl.com/reloading-e ... 35271.aspx)
Our Premium Neck Turning Tool employs and eccentric mechanism for quick cut depth adjustments which are accurate to .00025 with our carbide mandrels. The audible click cutter adjustment knob is laser engraved and moves the cutter in either direction with a total adjustment range of .004 to .005 inches. The Premium Neck Turning Tool comes with three laser engraved feeler gauges which may be used to quickly set the cutter depth to the approximate range of the cut desired. With the cutter in range using the supplied feeler gauges, the eccentric adjustment knob enables the user to make the final depth adjustment to the exact thickness desired.

- Sinclair Case Neck Turning Tool.jpg (20.66 KiB) Viewed 3042 times
3. Sinclair Case Concentricity Gauge
The concentricity of your cartridge can have a significant impact on accuracy. The Sinclair Concentricity Gauge measures run-out, or how well the bullet or case neck is in alignment with the case body. The product description and image are from the Sinclair website (
http://www.sinclairintl.com/reloading-e ... 37479.aspx)
The Sinclair Concentricity Gauge is used to measure run=out by rotating the case or loaded round on two sets of bearings that are captured in anodized aluminum blocks. These bearing blocks are adjustable longitudinally to allow for different case lengths or varying lengths of loaded rounds. The handloader can measure sized cases on the neck, and measure loaded rounds on the neck or out on the bullet. The bearing blocks ride in a milled slot in the gauge base plate. This milled slot keeps the blocks in alignment with each other.
This arrangement provides the best support for the cartridge, enabling the user to spin the cartridge smoothly. Large thumb levers on the bearing blocks make adjustments quick and easy. The anodized base plate is extremely stable allowing the user to take accurate readings. The indicator tower is designed to permit vertical and side-to-side adjustment of the dial indicator.

- Sinclair Case Concentricity Gauge.jpg (13.23 KiB) Viewed 3042 times
This video gives an excellent visual of how the gauge functions:
http://bcove.me/s8w4ltt4
4. Sinclair Flash Hole Deburr Tool
Consistency in every aspect of cartridge construction is important. Mass produced brass, while of high quality, still leaves a great deal of opportunity for improvement by the handloader interested in accuracy. Removal of burrs, produced by the mechanical process of mass production of brass cases, leaves excess metal in the form of burrs that need to be removed. Description and image from the Sinclair website (
http://www.sinclairintl.com/reloading-e ... 34127.aspx)
The Lastest version of our Model 1000 flash hole deburring tool features stainless steel construction and chip clearance slots which alleviate the tendency of the tool to collect chips in the end of the cutting shaft. This tool is inserted in the case mouth and uses the web of the case as a safety stop. A couple of turns will remove any burrs and leave a small chamfer on the inside edge of the flash hole. Flash hole deburring is a one-time operation. Since variations of case length do not affect the use of this tool, flash hole deburring is most easily performed on brand new brass without trimming.

- Sinclair Flash Hole Deburrerr Tool.jpg (9.28 KiB) Viewed 3046 times
5. Sinclair Case Trimmer
Sinclair teamed up with L.E. Wilson to produce their case trimmer. This is their description and image, both from the Sinclair website (
http://www.sinclairintl.com/reloading-e ... 36320.aspx)
The L.E. Wilson Stainless Steel Case Trimmer is the most accurate case trimmer in the world! The unique way the case is held assures your cases are aligned square to the cutter during trimming and that the trimmed length is identical for each case.
The L.E. Wilson trimmer uses case holders that hold the case neck by the body taper and utilizes no pilots during the case trimming operation. The trimmer utilizes a rail system that the case holders, cutter housing, and adjustment stop sits on providing perfect alignment with each other. Trimmer case holders are available separately.

- Sinclair Case Trimmer.jpg (14.42 KiB) Viewed 3046 times
6. Hornady Bullet Seating Depth Gauge
One of the simplest handloading techniques that can have the greatest effect on accuracy is changing the seating depth of your bullets. Determining the limits of seating depth requires a tool known as an "Overall Length Gauge." Hornady currently offers an OAL gauge which has worked well for this handloader. Here is what Hordady says about the importance of seating depth (
http://www.hornady.com/store/Lock-N-Loa ... ght-1Each/):
One of the best kept secrets in accurate reloading is precise bullet seating depth. Regulating seating depth and the resulting "jump" to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference between so-so accuracy and real tack-driver performance. The Lock-N-Load® O.A.L Gauge is universally acclaimed as the most accurate, easy-to-use and reliable method of obtaining that critical relationship.
Here is what it looks like:

- OAL Gauge.jpg (86.08 KiB) Viewed 3031 times