Is it just me or are weapons in Shadowrun 5e underwhelming damage-wise ?

For the sake of argument I imagined a situation, one of the world's « best » snipers against a surprised target, with a Barret Model 122.

Shooter is an Elf with maxed out AGI and Exceptional Attribute (AGI), Bioware boosting his AGI by 4 (Muscle Toner & Suprathyroid Gland) for a total of 12 AGI.

He also has 13 in the Longarms Skill (with Aptitude) and a specialization in Sniper Rifles for a grand total of 15.

Let us add that he takes the Take Aim action twice, and has a Smarlink, for another 2 Dice Pool and +2 Accuracy (or DP).

Considering all this he has 31 dice and 11 accuracy, which statistically gives him a whooping 10 successes (9 if making a called shot), thus boosting his damage up to 23P or 24P.

Once again statistically he will obtain 7 or 8 actual damage boxes.

Now for the target, let us assume a random human with 3 in all stats and no armor (we assume the shooter uses APDS so most regular armors do not apply). With his stats he statistically has 10 boxes of Physical Condition Monitor and will have 1 success on the damage resistance test, thus incurring a total of either 6 or 7 boxes of damage.

To sum up, 6 or 7 might seems like a lot but it seems VERY underwhelming to me considering it will NOT kill the target outright even though the shooter is maxed to the gills and using a friggin' Antimateriel Rifle.

In real life such a situation would result in 100% death rate for the target, even using much smaller calibers... so what's wrong ?