Duty ammo in use by german police has to comply to certain technical guidelines ("Technische Richtlinie") for police equipment. There are, of course, exceptions for some special assignments, but nowadays usually one of these two loads are found in german police pistols:
http://i100.photobucket.com/albums/m28/from_HH/HH-P6005-1.jpgThe cartridge with the blue tip is the PEP (="
Polizei-
Einsatz
patrone" ~ police duty cartridge) made by MEN (= "
Metallwerk
Elisenhütte
Nassau")
The other one with the yellow tip is the Action4 made by Dynamit Nobel AG (DAG, today part of RUAG Ammotec)
Both have basically an all copper alloy hollow point bullet with a color coded plastic insert.
These plastic inserts serve three purposes:
They give the bullet an ogive FMJ-like shape to ensure reliable feeding;
They protect the bullet from getting clogged up with soft material from clothes when entering a body, which tends to prevent proper expansion of the bullet;
They act as starters for proper expansion of the bullet in soft body tissue.
The copper bullets won't be destroyed as easily upon hitting hard surfaces as leadcore bullets would and give more uniform performance. They don't ricochet as easily as traditional FMJ-bullets and they're punching clean non-collapsing holes in vehicle tires.
Previous variants of the MEN PEP were marketed as "Quick Defense" (QD1 through 3) loads. The plastic inserts are color coded (black, red, green) to allow quick reference which load is at hand. They all have a ball shaped plastic insert, which resembles the powerball bullets somewhat, but the copper bullets usually work better overall due to their different material. The different numbers of the original QD loads denote different hardness of the copper alloy, which determines the balance between expansion vs. penetration. The blue tipped PEP is the current version of the QD load for police use.
The DAG / RUAG Action loads generally work along the same line as described above. Their plastic inserts are however not ball shaped, but look like little mushrooms and have a small stem. They're color coded for the same purpose as well. The original Action load differs somewhat in that the bullet has a hole from its base to the hollow cavity. Upon firing the round, the plastic insert (golden colored) is blown out in front of the bullet, which then looks and acts like a classic hollow point bullet.
This load has been marketed in the U.S.A as the BAT load under the old german Geco trademark (Geco = "Gustav
Genschow &
Co." ; Dynamit Nobel used the Geco trademark for their handgun ammo, while they marketed their rifle ammo under the RWS = "
Rheinisch-
Westfälische
Sprengstoffabriken" trademark). All newer DAG / RUAG Action loads such as the Action Effect (green), Action4 (yellow) and Action5 (black) retain the plastic insert as mentioned above.
Initially, the Action4 had been chosen as our duty load in the city of Hamburg. But after some use it turned out that the tiny yellow plastic insert might seperate from bullets on cartridges that were chambered and extracted multiple times (as is regularly done by many officers at the start / end of their shift, since most german officers chose not to carry off-duty). Although officers are told to change the top cartridges within their magazines often to prevent excessive damage of the ammo, this is not always done. The small plastic insert of the Action4 was suspected to cause jams, if it wedges somewhere in the pistol with its stem. The Action4 was replaced by the PEP to address this perceived liability issue, because the bigger ball shaped insert of the PEP seems to be less prone for this failure.
We still use FMJ ammo for training only, as it's cheaper and the lower pressure of the FMJ ammo is easier on the pistols.
edited to correct some typos