I have to say now that I have a take apart evo-9 (thanks Matt) and the Mystic... I do shoot a lot of lead subsonic bullets ...
I also hesitantly shot some PLATED 44 240 gr HP bullets through my Osprey. (5.3 gr of American Select) .. They are not very fast about 800 FPS from a 9" Thompson Center Contender and sound nice.
I had 500 of the plated 240's I get NO leading in the barrel ZERO... I also have inspected the Osprey very closely for lead and have seen no real signs of leading so far. I was very worried about it but so far so good.
I did test some 200 gr lead hard cast and after 4 shots decided it was NOT OK. These were the same charge of AS but with the 200 gr bullet. I noticed a very slight condensation of lead mist which I have seen in my Mystic and know how much this can = after some time, so I STOPPED and will NOT shoot any more..
I then tried some coated lead bullets from Precision. I have about 2000 of the 200 gr 44's
In my revolvers I got some leading maybe in a revolver the side gets scuffed off in the gap... BUT maybe these bullets in a single shot are OK. I will test some more. If they do not lead they may be the solution for a less expensive, SOFT, easy to deform bullet for subsonic usage.
Unfortunately they no longed make them in .44! But for .45 and 9mm (147gr is in the product offering) these may be a good option to "Plated" bullets.
More later after I test some more of the "black bullets"
A melted bullet: http://www.precisionbullets.com/IMG/bullet1.jpg
---------------- Precision Bullets --------
Precision Bullets are swaged with certified 6/2 lead alloy. We then apply our unique dry-lube formula. This process completely encases the precision lead core.
What does this mean for you? Safe for indoor ranges. No leading in the barrel. Fire more rounds downrange between cleanings. Load twice as long and twice as much before cleaning your dies. Less smoke since no messy wax lubricants are used.
Precision Bullets cost only a few dollars more than the cheapest cast lead bullets, but they give you jacketed bullet ballistics.
They are clean, safe and accurate.
You can fire our bullets at over 2000 feet per second with no leading and no copper fouling and no messy lubricants.
The tough coat protects the bullet from damage and is a natural lubricant. It keeps the bullet at tight factory dimensions and goes through the bore intact.
That means no lead on your hands, no lead dust and no toxic fumes.
Even long sessions at the loading bench or when shooting on indoor ranges. It means clean hands, clean guns, clean reloading dies - and clean air.
And you get a bullet which is highly uniform in weight and dimension.
--------------- and a review here: http://www.precisionbullets.com/articles/fs0202pg62.htm