-> I'll avoid anything marked "burp-gun ammo". However, my P-1 is a 64
-> steel-framed model. It might stand up to a little more abuse. Still,
-> I don't want to risk it. I don't know what +P's and +P+'s
-> are,`however.
These refer to cartridge pressure levels.  To use 38 special as an
example:  regular 38 special rounds will generate 18,000psi.  38 special
plus P's will generate 22,000psi.  38 special +P+ may run 27,000psi.
+P's are sold over the counter, +P+'s are not, they are sold directly to
police agencies, which sign a blanket release absolving the ammo maker
from all liability.  Generally, they only shoot them in 357 magnums, not
regular 38 specials.
As far as 9mm ammo goes, generally speaking, European ammo is loaded to
NATO spec, which is said to be "hotter" (higher pressure) than american
ammo, which is loaded to SAAMI spec.  (Shooting Arms & Ammo Makers
Institute)
Also, the Europeans have a tendency to load some 9mm ammo extra "hot"
specifically for use in sub-machine guns.  (The Europeans may refer
to them as "machine carbines" or "machine pistols") The boxes are so
marked, but I don't believe the cartridges themselve are.
Regards
John
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