My Extrema does fine with very light lubrication. I use BreakFree CLP on the action and bolt. The magazine tube gets a wipe with the same and or Rust Prevent. Silicon cloth on the exterior. Arkansas duck hunting in the swamps and rice paddies have caused no problems. Lee Wild
I had used the Hornandy One Shot ,which is a lubricant . It goes on wet , then drys to leave no oily residue. I thought that this would attract less burnt powder residue. I use this on my Spolar where the primer feed goes across and it works great. I hear you are the Beretta Automatic Guru.
Charlie my guess is what you are using has teflon in it is that correct? Wet is the only way to go trust us guys that shoot them year around. If oil is trying to run out you have just the right amount applied. I shoot about 10,000 rounds each year thru a 303 and 390 and only clean them twice each. They work like a sewing machine as long as i give them a squirt of oil before i shoot each day. Only clean when they get sluggish. Breakfree CRP keeps them running without a hiccup. Some guys just clean them way more than necessary and then don't apply enough lubricant whan they get done. Like Tron said when you drain oil in your car you put in just as much as you took out. Beretta autos love oil.