Ammunition
Surplus 7.62×25mm Tokarev ammo from China, Russia, Austria, Bulgaria, and the Czech Republic as well as current commercial ammo produced by Sellier & Bellot all measured 42,000 c.u.p. at the lab at Accurate Arms in 2000 by ballistician Ted Curtis. He measured the surplus Soviet ammunition averaging 31,000 c.u.p. The Czech ammunition was manufactured for use in the CZ52s, while the other countries were manufacturing ammunition used in Tokarevs. Accurate Arms then sold load data in 2000 listing 42,000 c.u.p. loads for CZ52s. By 2004 Johan Loubser Ballistic Lab manager at Accurate Powders reduced the loads to less than 2400 bar or 34,809 psi, and those reduced loads were made complementary from AA on their web site. While the 86 gr AA#9 load is said by AA to be reduced from 41,300 c.u.p. to 33,851 psi, Quickload software calculates that AA's loads went from 57,158 psi down to 28,551 psi. Loads by Sierra at 90 gr AA#7 specifically for the CZ52 remain at 22,385 psi as calculated by Quickload.
By the late 1990s, after the popularity of the surplus CZ 52 had started to increase, hollow-point ammunition in 7.62×25mm became available from custom shops. The pistol proved capable of handling extremely "hot" loadings, and many shops sell custom or hand-loaded ammunition.
Replacement barrels are available to change the caliber to 9 mm Parabellum. Doing so provides a much wider range of ammunition choices, at the cost of a significant drop in power. As of 2010, manufacturers have ceased production of 9 mm drop-in barrels for the CZ 52.
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