Depends on what range you want to play. All of them are pretty good tbh. If you want straight up minimum ttk nothing beats the ag/m42. Otherwise the Turner is probably the best all-rounder (I personally use quick ads, detachable mags and a 3x on it though).
My personal list, playing on console, semi's as my favorite guns in the game and like to play objective, which means that slow ROF guns with bad hip fire aren't really an option (sorry Selb 1916 and Johnson):
Best all around semi: MAS 44 Best semi for larger/open maps: Karabin Most versatile semi: Ag/m42 Honorable mention: Garand (not heavy load)
Semi I really want to like but only seems to work well in specific situations: Gewehr 1-5
Comments
Turner smile with 1.5 zoom or 2x zoom (2x zoom looks weird)
M1 Carabin with 3x zoom
Selbstlader with 3x zoom
Karabin as meta weapon
Best all around semi: MAS 44
Best semi for larger/open maps: Karabin
Most versatile semi: Ag/m42
Honorable mention: Garand (not heavy load)
Semi I really want to like but only seems to work well in specific situations: Gewehr 1-5
That's why I'd vote for "add what zoom did the enemy used"
The way I see it - Selb, Carabine and Breda all have over 20 rounds per clip. Why choose anything else?
One example where if you pick the right zoom it can suddenly become a better gun.
which one has the 3x zoom issue? Breda or m2?
has damage less than selb and more than garant.
There is no bad SAR in the game, it comes down to playstyle.
Close range the 1-5 + the ammo capacity. The Turner with irons and the 20 capacity are another.
The Gewher 43 isn't the monster it once was, but it or the Karabin are strong at medium +.