Frequently Asked Questions

Not sure about something or have a question? Check our FAQ below...

As the machine heats up, is the accuracy of annealing affected?

No. Every time a cartridge is inserted into the annealer and the start button is pressed, the software preforms a diagnostic. This only takes milliseconds, however it automatically corrects for variables, in particular rising machine temperature. This ensures that as the machine heats up with use, annealing is consistent throughout the entire batch of brass. The last case neck will be exactly the same annealed hardness as the first.

What if my neck wall thickness falls between the dimensions given in the Settings page?

For any given cartridge, the program progression is linear. If, for example we list Program 90 for a neck wall of 0.014", and Program 86 for 0.013", then Program 88 will be correct for 0.0135".

Should annealing be done before or after resizing?

If annealing brass that has had multiple reloads or is of unknown history, we would strongly recommend annealing first followed by resizing. This is because the harder the brass, the more likely it is to resist conforming to the resizing die and "springing back”.

Our settings target an annealed neck hardness 100 Hv. Because the process anneals both the neck and shoulder, die conformity will be correct when resizing. Note: we have found that the target annealed hardness is reached reliably regardless of the starting hardness i.e. it doesn’t matter if it starts at 20% harder or even 70% harder, it will still come back to the same hardness.

If, as we recommend, annealing is done every reload, the brass is always soft enough in the neck and shoulder to resize accurately either before or after annealing. We have, however recorded consistently more uniform hardness test results by annealing before resizing, and we therefore recommend that sequence.

Stainless steel media tumbling – does this work harden brass?

Many of our customers use this cleaning technique, so we have run some detailed testing on this subject.

The short answer is no, stainless steel tumbling has no effect. For more detail see

Note: If you are using stainless steel media for case tumbling, you must be certain to remove all media from cases before annealing. If any media dislodges inside the annealer inductor well, it will be heated to a very high temperature during the annealing cycle. This will melt the bottom of poly carbonate inductor cradle and ruin the inductor. This will void the warranty.

Do I need to adjust my sizing die?

If you are full length resizing or shoulder bumping you should check your die adjustment. After annealing with AMP you will have zero spring back, and you may need to back your die out a fraction from what you have been using when resizing unannealed brass. If you anneal each reload as we recommend, you will get extremely repeatable and consistent sizing. For the same reason, if you are using a bushing die you may need to check the sized neck diameter. Zero spring back can mean that less sizing is necessary.

I use nitrite bushing dies. Do I need to lube my cases before sizing?

Yes. Because AMP anneals the necks to 100Hv, the necks will tend to gall without lube. This will make sizing effort seem greater than usual. With lube the softer necks will be easier to size.

Do different brands of brass in the same cartridge require different settings?

Yes. There are wide variations between brands. We establish the correct settings by micro Vickers hardness testing. Turned brass also requires less power, and we therefore list turned settings where appropriate.

What is the consistency lot to lot of the same brass?

In general we have found excellent consistency. We have, for example, tested two batches of Winchester 308W brass manufactured twenty years apart which needed identical programming. There have been exceptions however. For example, we have tested two different lots of Norma 308 brass which needed quite different power levels. When this occurs, we note the difference on our Settings page. We always recommend that customers send brass for testing even if we have previously done the calibration. This is a free service, and guarantees the accuracy of their results.

What about power fluctuations?

AMP is designed to run anywhere in the world. It operates anywhere between 85V – 265V.

What if I accidentally anneal the same case twice?

Our target annealed hardness for all brass is 100 Hv. Provided the necks are harder than this to start with, that is what our programs are calibrated to deliver. If the same case is then re-annealed after cooling down, the neck hardness will drop slightly by approx. 4 Hv. The brass will still be fine, and when shot and resized it will come back to regular hardness. For absolute consistency we wouldn't recommend including that case in your match ammo, but it will be fine next time around. If the same brass is re-annealed when still hot, it will probably be ruined.

Does the annealer include thermal imaging equipment?

No. We used live video thermal imaging as part of our initial laboratory research. 

Now, all our programs and settings are established from repeated micro-Vickers hardness tests on each case. This gives real, verified accuracy.

If all factory brass is annealed in manufacture, why do some brands look shiny all over, while others have annealing colors on the neck?

A number of manufacturers polish the annealing marks off the brass, purely for cosmetic reasons. In the past, customers related annealing marks to cheap ex-military brass. That is no longer the case, and annealing marks are now somewhat "fashionable”.

How safe is AMP?

AMP has gained full certification for both Electrical Safety and electro-magnetic emissions compliance to all international standards.

How much power does it use?

The unit is rated for 750 Watts, but the maximum power setting used in any of our programs is 600 Watts. This is less than a small microwave oven.

Will annealing stop my case necks from splitting?

The biggest reason for necks splitting is excessive hardness. Because correct annealing keeps case necks at the optimum hardness, they will last much longer with normal resizing and shooting.

Will I notice any difference in the "feel” when I seat my bullets?

There are several factors which affect the force necessary to seat bullets. One of the main ones is neck hardness, and AMP will give much greater consistency in that regard.

Will annealing brass keep my velocities more consistent for better long range performance?

Yes and no. Old fashioned erratic annealing with uncontrolled, variable temperatures (and therefore variable finished hardnesses) may give minimal improvement. The main benefit of AMP is to give correct and repeatable neck hardness, and that will definitely improve velocity consistency. This will only make a small difference at close ranges, but once you get out towards 600 – 1000 yards, it will definitely help reduce vertical stringing.

How much does it cost?

Check with your regional distributor.  Our annealer is about the same price as one mid-price range rifle scope.