First of all it has great muzzle velocity, so it’s a good idea to use it when you expect range combat.
Also you can pen some vehicles you can’t otherwise or go through a Panther more easily from the front.
It will pen even when you hit a 200mm area of the turret.
Its a good idea to learn where the gunner is on many of the tanks you see often. that way you always know where to place your first shot to disable an enemy, and can then kill them with subsequent shots. The comet and challenger and Cruiser tanks, so you can use their speed to get to good positions, which you will of course have to learn for each map. Your armour is poor, and the reverse speed is awful, so you are best in a hull down position and you should be careful not to push too far, because you will struggle to retreat if you are being flanked. Take a mix of apds and Shot MK.8, use the apds for anything you are struggling with, but i would advise generally having the Mk.8 loaded most of the time.
Good.
Also, with solid shot rounds at that BR you’ll most often want to shoot to disable, not OHK, so knowing where their gunner sit should be really important.
I’ve mostly used APDS on Challenger, it performed pretty well for the most part, while I only used Mk.8 when targeting something lighter or when I knew my positioning will grant me many side shots, at which APDS really isn’t great.
Other than that, they don’t play much differently than other mediums of their BR. They’ll often be pretty fast and Challenger has pretty nice gun handling, gun depression and reload as well, so use it to your advantage.
Their armor is meh at best, so not relying on that part is the best thing you can do.
Alloy penetrators are the ones used by the 105mm L7, and all of it’s versions (so cent Mk 10, Vickers tanks, M60s, STB-1, TYPE-79, chinese tanks with the 105mm guns, Leopard 1s, and all the 120mm guns on the Chieftains).
All the rest are just plain trash.
17pdr, 83mm, Conqueror’s 120mm, T54E1/E2, swedish low tier APDS.
On the note of the Conqueror, it can apply for the title of “worst tank in the game”, alongside with the Churchill 7.
I made an entier post explaining why is it useless:
You can help your team win in more ways than getting kills. Especially in a heavy tank like the Churchill. Just drawing enemy fire is a benefit to your softer team mates.
Yeah that is the downside, but if you’re getting bombed by CAS it doesn’t really matter what tank you are in.