ive got a few i choose from, sometimes two at a time.
my taurus 431 .44spl 200 grain hp(5 shot)
my feg 40rz .40cal 180 or 200 grain hp(8 shot)
my cz52 in 7.62x25 (8shot) 86 grain steel core (for those bad areas agianst hard targets

)
and always at least 16 rounds of ammo for the auto's (in extra mags)
and at least 15 rounds in speed loaders for the 44