RE: Knight bighorn
I've got a Bighorn and I like it. I was just finishing sighting it in yesterday and can make 1 1/2" groups at 100 yards no problem. I'm shooting 100 grains of Pyrodex with a 300 grain Hornady XTP and it has worked out great. Mine is still shooting caps. Since the 209 conversion is about $50 and I've never, ever had an ignition problem, I just can't justify spending the money.
The only thing I will say negative about them is they aren't the easiest rifles to clean. I know some of the newer in-lines, particularly the break-open barrel rifles, are easier. The Bighorn requires that you remove some screws and things to clean it right. Not a problem, but if you're in a hurry or don't like cleaning guns (like me) it can be tedious. Not hard, just a little more time consuming then others. Overall, I love it and it shoots great.