Pros: SMOKIN' FAST. VERY accurate, and surprisingly forgiving for the low brace height. Produces ALOT of energy at moderate draw weights.
Cons: At longer draws, and higher poundages, they are a little thumpy, and can get a little noisy with light arrows. Low brace height will be an issue for many folks due to improper draw length/form. Very narrow valley & stout draw force curve at longer (29 & 30") draw lengths.
If you have a shorter draw, or don't want to pull a ton of weight it's a great choice for a hunting bow.
I decided seeing I have a 28" draw to try the BK this year and what Jeff said is very true.
I was very surprised that a bow with the power the BK puts out is very shootable and for me very forgiving.
My set up is 60lb 28" draw 400 gr Axis arrows 280fps consistantly through the crono for 70lb of KE.
If you have a longer draw lenght then I would recomend the Pro 40 dually a friend of mine has one and let me play with it for a week but I kept it for more like a month

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At 60lb 28" draw the same 400gr arrows 272fps through the crono with 7" brace extremely accurate ( as with all the BT's I have shot) quite and forgiving.
Like Jeff said if you have any form flaws the short brace of the BK is going to let you know.
In all honesty with either the BK or Pro40 Dually you wont need any more then 60lb draw weight.
The valley does take some getting used to it is only about 1/2" so you really have to draw the bow slow so when the cams roll over you can ease it into the rock solid back wall if you dont draw slow then you are going to bounce off the wall.
Hopefully I will have some pics next week of what the combination of 1 crazy Aussie, 1 Black Knight and 400gr Axis arrows tipped with Muzzy 100"s will do to pigs


