Unfortunately I can't capture a screen of this happening since usually I'm flailing and can't screenshot and shoot at the same time. I'm putting it out here since I got some similar feedback from another Triarii members last night while we were on TS3.
The IS7 is known for getting in your face- but when I'm there, in sniper mode, aiming at a weak spot roughly half the time my shot just disappears. It's not a bounce... since you can't see any hit or ricochet (confirmed by my platoon mate on TS3)... it's not a hit since there is no damage.
My understanding is that the bullet doesn't leave the end of the gun barrel- and that the gun barrel is just an "accent" that is non-collidable. The bullet leaves the turret at the gun mantlet- so the barrel showing through the other end of the tank (not really the issue when you're face to face) shouldn't be a problem.
I'm wondering if anyone else has been experiencing this? I'm not sure if it was like this in 1.1 since I didn't get into an IS7 until 1.2... but it's frustrating that it's the ONLY thing this tank does well and yet half the shots disappear.
Thanks for any insights!