It definitely does not deserve to be anywhere near 70 ammo just for 1 Pzschreck.
If take SU AT package which is 60, it provides 2 PTRS being not equivalent to the 1 Pzschreck but being nearly twice as efficient.
Why? Because in 7-8 seconds PTRS does around 240-280 damage while Panzershreck does 120 damage. Only a second after would deal 240 damage for Panzerschreck but the PTRS would deal even around 300 damage.
I do not see the point at all in keeping it 70 ammo when its clearly not the best. Sure better than bazooka, but not that much better than the PTRS package.
Does not justify at all. It should simply be 60 ammo.
Fair enough. I agree.