Combat Power I Equipment

1. Gun Rammer
2. Improved Ventilation
3. Calibrated Shells
4. Best Equipment Choice

Gun Rammer

What does this mean?
You will have better DPM and the gun will reload faster.

Why is this useful?
Its useful since you can take more shots at enemies, and there are more opportunities to deal damage

What tanks to use Gun Rammer on?
Every tank that can. At least at first. Once you get to know the capabilities of the tank, and you feel that the penetration it has is definitely not enough, only then do you try Calibrated shells. There is no reason to put yourself at a DPM disadvantage by using Calibrated Shells before using Gun Rammer. 

Improved Ventilation

What does this mean?
Its basically the Food provisions of different nations, but made into an equipment piece.
It makes your accuracy, reload, traverse speed, and view range better; but only by a very small amount.

That “small” amount means you should usually take Calibrated Shells over this.
Unlike Gun Rammer, Vents only gives 1.5% DPM, and the accuracy/mobility improvements are not noticeable. So using Calibrated Shells gives your tank better effective DPM than Vents, since you will penetrate more shots while having basically the same DPM and reload speed.

What tanks to use Improved Ventilation on?
Most tanks that have Improved Ventilation don’t need it. 

If your tank has exceptional penetration, using Vents won’t put you at a disadvantage. Tanks like the Emil 1951, Steyr WT, Lorraine 40t, FV4005, and T28 Defender can use Vents and be just fine since all of these tanks have great penetration.

Calibrated Shells

What does this mean?
It makes all shells have higher penetration, but HEAT and HE type shells get double the benefit of AP and APCR shells. 

What tanks to use Calibrated Shells on?
Tanks with Autoloader and Auto-reloader guns.
If they have a regular gun, try Gun Rammer first, if you feel the tank lacks pen, then use Calibrated shells.
Calibrated Shells would be best used on tanks that use HEAT or any type of premium HE, as it gives more benefit to those shell types.

Best Equipment Choice

Which Equipment piece is the better choice?
You can only take 1 of these 2 equipment pieces on a tank.

Don’t get attached to 1 equipment type. There is no black and white answer to these equipment sets, Calibrated shells is never going to be the best equipment piece on every tank, the same goes for Vents, same goes for Gun rammer. Don’t go in blindly using other peoples opinions on equipment. Try it yourself then decide.

Gun Rammer vs Calibrated Shells:

Use Gun Rammer. This equipment piece is trial-and-error, there’s no right or wrong choice.
Play the tank with Gun Rammer. If you feel you don’t have enough penetration, then go back and put on Calibrated Shells.
There is no point to using Calibrated Shells if you haven’t tried the tank first and found it needs more pen. You will just be putting yourself at a disadvantage in DPM, especially if its already average-low on that particular tank.

Improved Ventilation vs Calibrated Shells:

Generally use Calibrated Shells. Unless your tank has some crippling downside, Calibrated Shells will give a larger benefit than Ventilation.
Unlike on tanks that have Gun Rammer, the DPM and reload difference between these two equipment pieces is minimal, and you may as well take higher penetration, as 1.5% more DPM form using Vents is not noticeable.