I carry the 190 interceptor with a bleeder and the 190 Treeshark with bleeder (both screw in) on a regular basis. I've killed 5 big game animals with the 190 interceptor without failure of any sort. Two weeks ago I used one on the second shot to my goat, it broke both front leg bones and stuck in a cactus 10 yards away...still straight and huntable. A few strokes on the wheelie sharpener and it was as sharp as before the shot. I've had one penetrate a small buck's vertebrate, downing him, but the head came out unscathed and still as straight as the day I mounted it. All the rest, well it leaves enough blood to follow the trail by touch if necessary.
I've yet to kill anything with the big tree shark but I wouldn't hesitate to shoot it at any deer sized critter. On hogs, I probably wouldn't shoot it at a big one, even with the high horsepower bows I normally shoot but not because I would be worried about it bending but the big wide blade catching a legbone and not penetrating properly.
I've said this on other posts, but I think the Simmons are superb heads. They are the straightest "traditional head" I've ever owned, each and every one spun like a brand new field point. I find them very easy to sharpen, especially with their cheap wheelie sharpener. With the bleeder installed, it opens up most everything like a can of soup. I always have at least one in every quiver I carry, that says a lot.