Constant heavy charging

This spring I installed a Holley Sniper and HyperSpark system along with a new in tank electric fuel pump. It all works fantastic! At the same time I installed a new 800 amp battery. I have a 360 engine in the Scamp. I replaced the alternator about a year ago with an Autozone 65 amp alternator.
My concern is that after the Sniper install the alternator gauge is always showing very heavy charging even on a half hour run. And the battery always tests about 12 volts with both a tester and the sniper monitor. But it always fires up. Does this sound like a bad battery?