Walther PPQ M2 T4E .43cal. Co2 Pistol

Umarex distributes the Walther PPQ M2 T4E .43cal. Co2 pistol.
"Riot-Ball" ammunition  roundball ammo made from PVC/nylon and is dense and very hard.
They are designed for "less than lethal" self defense and training.

I bought my Walther PPQ M2 T4E because when combined with Riot-Ball ammo, it is an amazing big bore Co2 pistol🔫

I bought 20 rounds of 5.2gram .43cal./10.85mm steel roundball from an eBay seller in Germany.
They load and cycle perfectly, but the muzzle velocity seems consistently around 150-170 fps, which creates the same muzzle energy of 5 fpe (foot-pounds) as the much lighter one gram/round  Riot-Ball ammo.

.43 caliber/10.85mm Ammunition Update re: Walther PPQ M2 T4E Co2 Pistol

I purchased 1000 rounds of PVC/nylon Riot-Ball ammo and the 13.3 grain .43 caliber Riot-Balls cost me 25¢ apiece, well worth the cost to feed this amazing Co2 Pistol!
I tested them once and got chronograph readings of as high as 423 for with a six shot average of 412 fps, which is over 5 foot-pounds of serious blunt force energy!

Then I saw a German AirGun reviewer demonstrating 10.85mm steel and lead balls, and I began to hunt, at first only finding 11mm steel balls on eBay, which I ordered an recieved 100 for less than $20 CDN.
Soon after, I came across a German eBay seller and different packages of 10, 20, 50 &100 10.85mm 5.2 gram steel balls ammo specifically sized for the .43 cal. T4E Co2 guns!!!
I ordered 20 rounds to make sure they actually fit, because the 11 mm balls from China were 0.15mm too large!!!

My 20 round package arrived yesterday, and they fit perfectly!
At 5.2 gram or over 80 grains, these 10.85mm alloy steel balls could be absolutely devastating to anything they hit, but I don't know how hard the Walther PPQ M2 T4E Co2 pistol can shoot them.

I will test them with my chronograph any day, and will update this post with some stats soon after that.

UPDATE:
I tested the 5.2 gram 10.85mm/.43cal. steel ball ammo with my Walther PPQ M2 T4E Co2 pistol, and I recorded shots as high as 170 fps and averaged about 160 fps ...
This is definitely a close range ammunition. Perhaps 5 to 7 meters .

The 13.3 grain PVC/nylon polymer Riot-Balls are definitely the best ammunition choice for this particular Co2 gun.

Ying & Yang : Walther PPQ: M2 T4E .43 cal. Co2 pistol & Tactical FDE .24cal/6mm spring piston Airsoft pistol