Got a new Bersa Thunder PLUS duotone arriving early next week. I know they are not the most expensive firearm in the world, but all things considered, how many rounds would you think to break-in? Hopefully given the recent $$$ for 380 ammo, I can afford to break it in. I have been advised to avoid steel case and then for cc and protection ammo, look to some CorBon DPX 90gr? The factory protective covering/finish is ??? What is best to initially clean it up to take out for shooting?