[SAVAGEJIM]

Only the Fiochi rounds are found on actual physical LGS store shelves. These Fiochi rounds are:
FNH SS197SR (these are all Fiochi loaded)
Federal (American Eagle) AE5728A TMJ(or FMJ) (also loaded by Fiochi).

Any other 5.7x28 loadings are only available online.
No actual physical store carries any other loading a than the Fiochi ones (unless you are lucky enough to live close to ammo sellers who sell other loadings online)

 

[SAVAGEJIM]

If you are fortunate enough to live near OMB Guns, they have SS198LF on the shelf when it's in stock.

Let them know they need to open a store in Texas.
I will be a very frequent customer.

 

[SAVAGEJIM]

New to the FiveSeven, just wondering, after reading here seams that no one likes the SS197SR 40 gr Vmax, just wondering why? What makes the others better?

just like what Trent said below: faster projectile by lighter projectile weight and possibly also a hotter powder loading.
But just reducing the projectile and using the same powder loading in the SS197 will increase energy because the projectile would be accelerated more quickly because the force applied to it has less mass to move. (Simple physics)

The ss195 and 198 have higher velocity due to lower bullet weight and a hotter powder charge. Additionally they tumble rather than mushroom or whatever vmax does (fragment?).

the SS197 SR V Max usually does not fragment.
Online vids show v max terminal ballistics in soft target doesn't shred or fragment. It can shed the v max ballistic tip though