Guys, contrary to the popular believe, Russians were/are actually quite pragmatic regarding the survival of high rank personnel. So, if cosmonauts really needed a bear defense gun they would definitely receive one. See, those cosmonauts were recruited usually from the Air Force, so those guys definitely knew a thing or two about survival and round efficiency (for brown bears) - they cannot be easily fooled that those tiny 5.45 mm rounds will be effective enough for defense. The TP-82 primary function was an emergency hunting gun, not a self defense one. We cannot view that pistol out of the context of the time frame - it was introduced in 1986. In those times cosmonauts were expected to spend up to several days alone in the wilderness until the rescue team shows up and they had to feed with something. Remember, in the early kits Russians put even fishing equipment - hooks, fishing line, spoon baits... But as the technology advanced tracking of that capsule became quicker and more efficient, therefore the time spent until rescue arrived became shorter - several days became just a couple, the couple of days became one day (usually) and etc. I believe that back in the 2006, when that ammo expired, they simply saw no reason to continue using that kit - I mean, how tough it might be for them to organize new ammo production? They simply decided that a Makarov pistol was good enough.
