Grens Kar98s do 16 dmg per shot, increasing it to 20 dmg per shot is +25%, my mathematically challanged friend.
It introduces the EXACT problem why tommies were nerfed.
By suggesting change like that, you've proven you not only have no slightest idea about balance, you haven't even learned from proven and fixed mistakes.
Thats not counting any rof or accuracy compensation. And holly-molly, buffing kars a bit would put them in the same spot at least alpha damage potential as any other mainline infantry, while still being on a fragile unit. This basically gives grens some chance to drop an enemy model early and have some frigging chance to even win engagements before they melt to double bars/brens and have to retreat. Because God forbid Grens would be actually GOOD at something.
There was never any mention of any of this, but if you did "adjust" to keep the DPS the same, you're re-introducing ANOTHER problem that was fixed long time ago - RNG cannons, as grens couldn't have high accuracy they have now, you'd basically make cons 1.0 when they were fine on paper, but high dmg and low accuracy meant they were trash in practice.
Oh I am also sure the only difference between Grens and Obergrens is their Kars damage output. Never mind far better abilities, veterancy, accuracy, great RA out of the door, sprinting, handnukes, running and gunning with lmg, and ambush camo.
Fact is though 4 Kars have avarage at best damage output to start with, which becomed laughable by mid game to the extent that unupgraded grens are completely non viable. the LMG 42 is effectively a defensive one, but a downgrade of their offensive damage, since either you move or fire the lmg, and you cant afford standing in he open with a unit with only 4 models.
Ohh boii, there is so much wrong with it that just reading it kills brain cells.
The only thing you got right was that obers get sprint from vet and have DIFFERENT nade, not better one.