Using a DPS comparison tool, it seems like PTRS conscripts are weaker under 10 range and stronger over 25.
Though not that much different either way.
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Anyway. I've actually been using tank hunters (almost solely) for the last few weeks and I really like it.
My infantry tends to be at least 3 conscripts/2 HMGs/2 mortars. Depending on the situation I might add another conscript or another HMG, possibly both.
Those conscripts are actually really dangerous if vehicles get too close to them. The second grenade consists of three grenades and doesn't home so it's very had to hit anything unless the vehicles come into "melee" range". However, they can be really devastating if they all hit. A single conscript squad can kill a light vehicle with just those two. Two sets of grenades from two conscript squads can kill a panzer IV.
And even without the grenades, the PTRS themselves are decent though to push back light vehicles and most tanks.
1 PTRS conscript > 1 light vehicle (exclude flame HTs and kiting luchs)
2 PTRS conscripts > P4
3 PTRS conscripts > Tiger
King Tigers... are a problem because of how they keep wiping squads.
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The downside of this is that I'm using conscripts which are terrible at infantry. That's why I always have 2-3 HMGs. If I want to fight any sort of infantry, I'll almost always try and pair the conscripts with a HMG, which I just attack move around. HMGs are a great normalizer.
And conscripts are useful for stopping guys charging/flanking HMGs. Flame grenades will stop that. Or at least give the HMG time to escape.
Conscripts/HMGs aren't great for killing squads or dealing with squads in heavy cover but that's what the mortar are for.
I think that I'm having an easier time dealing with infantry than when I was using guards/penals...
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Another nice thing is that conscripts and support weapons are really cheap. With penals/guards I was always struggling with manpower, Somethings I'd have to intentionally leave my infantry at my base without reinforcing for a while so I could get enough manpower to build a tank. I have a lot more leeway now, sometimes building caches because I don't have enough fuel and more infantry could be counter productive.