The design of an Exact Sizing Die incorporates all the adjustment needed for never before experienced, accuracy, repeatability and ease of use. The user need never again set up a die with respect to the reloading press mechanical stops and limitations. The Exact Sizing Die adjustment mechanisms are totally integrated and are not reliant on the quality or accuracy of the press used. It is prudent to acknowledge that an Exact Sizing Die is not merely a tool - it is a precision instrument that should be respected and treated as such.
The Exact Sizing Die will be shipped to you with the integrated Precision Adjustment Ring located on the Case Sleeve Assembly of the die, set to 60 “clicks” (anti-clockwise) from full lock (as deep as it can be screwed in without undue force). The Precision Adjustment Ring and Case Sleeve Assembly is a factory warranty assembled unit and should never be disassembled by the user.
Please note that all Exact Sizing Die Bodies are manufactured with a thread diameter of 1”-14 TPI. You will need a press that has the functionality of being able to unscrew the 7/8"-14 TPI die body adapter and replace it with a 1"-14 TPI adaptor. A 1"-14 TPI adaptor is very common and can readily be purchased at any reputable arms retailer.
Please note that the “Set Up and Use procedure for an Exact Sizing Die” is also available on video on our website at email@example.com
Item & Description
1 Exact Sizing Die (QTY 1)
2 Golden Case (QTY 1)
3 Neck Rehabilitating Arbor (QTY 1)
4 De-Capping Pin (QTY 1)
5 Process Isolation Tool 1 (QTY 1)
6 C-Spanner Wrench Tool 2 (QTY 1)
7 Shim Extraction Tool 3 (QTY 1)
8 Bush Extraction Tool 4 (QTY 1)
9 Head Space Gauge (QTY 1)
10 Torx Driver Insert T6 (M2) (QTY 1)
11 Torx Driver Insert T10 (M3) (QTY 1)
12 Necking Bush (QTY 5)
Item 1 | Die Body
Item 2 | Press Lock Ring
Item 3 | Sleeve Assembly
Item 4 | Sleeve Lock Ring
Item 5 | Precision Adjustment Ring
Item 6 | Process Isolation Tool
Item 7 | Necking Bush
Item 8 | Shim Pack
Item 9 | Top Cap
Item 10 | Neck Rehabilitating Arbor
Item 11 | De-Capping Pin
Item 12 | Arbor Pin Retainer
Firstly, familiarize yourself with the Exact Sizing Die's unique “dial-in" sizing method for perfect head space adjustment in micro precision increments.
Insert side A of the C-Spanner Wrench Tool 2 into one of the Case Sleeve slots and hold stationary. Rotate the Precision Adjustment Ring, clock or anti-clockwise, and experience the very similar tactile "click" that you would, when making elevation adjustments to your telescope.
Screw the die into the press to a depth that is acceptable to you and secure the large Press Lock Ring. It is not necessary to torque the lock nut screw with great force; two fingers are all that is needed.
Make sure that the die depth is deep enough such that the C-Spanner Wrench Tool 2 has ease of access to the Case Sleeve slots. (See C-Spanner Wrench Tool 2 access illustrated in Step 5). It is advisable to have the press semi-closed with the press handle/lever as close to horizontal as practical, as this is normally where your press’s largest ergonomic mechanical advantage lies. If the press lever is not quite horizontal, do not be too concerned as it will not influence the ease of function greatly. Normally, you will not need an excessive amount of downward force when using the Exact Sizing Die System.
Please ensure that the Neck Rehabilitating Arbor is removed from the Top Cap, before starting with the set up procedure. Insert the Golden Case into the case holder of the press. With the Process Isolation Tool 1 inserted between the die's Precision Adjustment Ring and the Die Body, close the press gently.
You will notice that there is a small gap between the die and the case holder. Open up the press and remove the Process Isolation Tool 1 so that you can gain easy access to the adjustment mechanism. You may wish to make use of a flashlight for "backlighting" when observing this gap.
With the C-Spanner Wrench Tool 2 inserted into a Case Sleeve slot, rotate or, “dial-in” the Precision Adjustable Ring anti-clockwise an appropriate number of “clicks”. The objective is to only just close the gap between the Precision Adjustment Ring and the case holder. Each click will achieve an adjustment of 0.0005”.
If you wish to do so, you can remove the entire die from the press (without loosening the Press Lock Ring), to perform this action, but we recommend making the adjustments whilst the die is mounted in the press as a time saving practice.
Re-insert the Process Isolation Tool 1 and close the press again. If there is still a gap between the case holder and the die, repeat Step 3 until contact is only just achieved. As soon as contact is made, your die is set up to the “zero” head space dimension of the Golden Case. With practice, this set up procedure will become almost “second nature” and will take no time at all.
Measure the Golden Case head space (if this is the first time that you are measuring the Golden Case head space, note it down for future reference) and also the head space of the fire formed case/s that you wish to process.
Adjust or “dial-in” the die's Precision Adjustment Ring equal to the head space dimension difference. This will be the “zero” head space dimension of your fire formed case. Note that that each “click” equals 0.0005” and that rotation in the clockwise direction will decrease the head space and anti-clockwise will increase the head space.
Golden Case head space Measurement: 2.2880”
Fire formed Case head space Measurement: - 2.2870”
From the above example you now know that your fire formed case head space dimension is shorter than your Golden Case head space dimension by 0.001”. So we need to rotate the Precision Adjusting Ring by two “clicks” (0.001”devided by 0.0005” = 2 “Clicks”), in a clockwise direction to decrease the die’s head space by 0.001”. Once you have done this, your die is now perfectly set up to the “zero" head space dimension of your fire formed case/s.
We are now ready to start the sizing process of your fire formed case/s for perfect fitment in your rifle’s chamber. Insert Side A of the C-Spanner Wrench Tool 2 into the Case Sleeve slot and hold stationary. Turn the Precision Adjustment Ring in a clockwise direction by one click. You have now adjusted your die’s head space by 0.0005”. Insert the Process Isolation Tool 1, lubricate and size your fire formed case. Remove the sized case and measure it with calipers and the caliber specific, head space Gauge to check if the head space measurement has decreased. Correct die set up and brass "spring back" will determine if the case decreased, or not. If not, give it another click, size it again and re-measure.
Fire formed Case head space Measurement: 2.2870”
Sized Case Measurement: 2.2865”
Decreased Measurement: 0.0005”
With "bumping" the case by 0.0005”, it is time to see how well the case now fits in your rifle chamber. Remove the firing pin assembly from your rifle bolt. If you do not know how, ask a professional to show you. You may need a removal tool, depending on your action. By removing the firing pin assembly, we remove all the spring tension from the bolt. The bolt will fall closed without any spring resistance. This enables us to feel and adjudicate the slightest resistance with our hands, when chambering a sized case. The theory is, with the sized case inserted, the bolt lever should now fall almost to the horizontal position. It should now only require uniform gentle pressure of one finger to bring the lever to the "locked down" position. This steady resistance should feel like pushing your finger through room temperature butter – hence the “butter like” bolt closure description.
If the bolt handle falls freely all the way down, you have sized the case too much. If it takes too much effort to close the bolt, then you have not yet sized the case enough and you need to decrease it by another 0.0005” and repeat the fitment procedure until you achieve the perfect bolt closure. Our Exact Sizing Die will allow you to attain this “butter like feeling” easily and consistently when these instructions are strictly adhered to.
Ensure that you have noted down the following head space measurements for future reference:
Golden Case head space Measurement: 2.2880”
Fire formed Case head space Measurement: 2.2870”
Exact Sized Case Measurement with Perfect Bolt Closure: 2.2855”
Please note that the advised fire forming process of a competition case takes at least 5 firings (rule of thumb). Exact Size your brass in between these firings. Also check your head space measurement and bolt closure feeling whilst in the fire forming and Exact Sizing process. Your brass might still be forming and settling in and might need further adjustment as it fire forms.
Once it is fully fire formed it will remain exactly the same with the same perfect “butter like” bolt closure, every time. Cases are never perfectly identical (even from the same batch!). Our design therefore allows for easy "tweaking" to ensure uniform bolt closure. This will enable you to turn a B- Class case into an A-Class case.
Now that you have set the die to the desired head space, you can set the Necking Bush to your requirement. To do this is very simple as the die makes use of shims/spacers to determine the depth of necking you wish to apply.
To set the necking length, unscrew the Top Cap of the die and remove the shims from the Die Body, with the aid of the Shim Extraction Tool 3. With all the shims inserted above the Necking Bush, the entire case neck will be sized. Therefore, to decrease the length of necking, you need only to place the desired number of shims under the Necking Bush flange and the remainder on top of the bush flange. Please note that the shim pack forms a set and all the shims provided must be used. The Necking Bush must be rigidly held in position and not have any movement whatsoever. This ensures that the integrity of the die design remains intact and concentricity enhanced.
When you have meticulously followed the above instructions, the accurate and uniform sizing of your cases will be easier than ever before. For the best results, it is imperative that you size the case body and neck, in one continuous process, without the case being released from the die.
In short, when the case has been sized with the Process Isolation Tool 1 inserted, lift the press lever slightly (less than 1/8” [3mm]) and remove the Process Isolation Tool 1. The idea is to lift the press arm as little as possible but just enough to enable the removal of the Process Isolation Tool 1, without resistance. After the Process Isolation Tool 1 has been removed, you can complete the neck sizing stage by depressing the press lever until it can go no further. Open the press completely and remove the Exact Sized case from the case holder.
1. Neck Rehabilitating Arbor
The Neck Rehabilitating Arbor may be screwed onto the Top Cap and used during the sizing process. Our Arbor’s unique design ensures that case necks are not oversized or damaged. The use of the Neck Rehabilitating Arbor will enhance concentricity, especially in the region of the case mouth.
2. How to remove the Sleeve Assembly
The Sleeve Assembly is removed by inserting Side B of the C-Spanner Wrench Tool 2 into the slot on the Sleeve Lock Ring. Turn the lock ring anti-clockwise to unscrew. Remove the sleeve assembly with care by gently pulling the sleeve assembly out the Die Body. The Precision Adjustment Ring and Case Sleeve is a factory warranty assembled unit and should never be disassembled by the user. When re-inserting this assembly, ensure that the Sleeve Assembly and Die Body bore are clean and lightly oiled. Tighten the Sleeve Lock Ring lightly only, as it has no bearing on the accuracy function of the die.
3. Bush Extraction Tool
The Bush Extraction Tool 4 is used to remove a Necking Bush from the Die Body. You need not remove the die from the press in order to change a Necking Bush. With the press in the open position, remove the Sleeve Assembly and Top Cap. Insert the Bush Extraction Tool 4 into the die, ensuring that the "stepped" end locates within the Necking Bush bore. Close the press carefully, and locate the heel of the tool in the case holder. Depress the press lever further until the bush and upper shims protrudes above the Die Body top and are accessible to you. The Shim Extraction Tool 3 can be used to remove the shims that were previously placed under the Necking Bush flange when determining the necking length, if need be.
Great care was taken to manufacture your die to a high level of precision. Please ensure that it is kept clean and oil lightly with an oil of your choice. Use a thicker oil for the outside of the sleeve contact surface area, as well as the external surface of the Necking Bushes contact area.
If you have any more questions, please do not hesitate to contact us now.