I'm thinking of getting a cross bow to hunt with. Been looking for a couple months and wondering what those that have used them think of
Barnett Quad 400
Barnett C5 Wildcat
Wicket Ridge Invader
Also, how often will the string/cables last?
Keep the string waxed and the rail lubed and the will last a long time, depends on the # of shots but will last lots longer with good maintenance. Have gone over 400 shots on one set of strings and cables on a Parker crossbow without accuracy degradation. Any broad head better than others
mechanical vs fixed
I like fixed, slicktricks are good as are Montechs 100gr vs 125- I assume the higher grain, slower speed?
true but I like 125s seem to get better accuracy with them over the 100s at least in my crossbow. Does speed kill or is kenetic energy better
A sharp broad through the vitals is what kills, this isn't like a bullet that kills with blunt force trauma. loss of blood is what really kills when using archery equipment. Anything else? Each brand has its followers and fans much like Ford/Chevy/Dodge... Go handle and shoot several and pick what you like. Have seen more than one person think they want one crossbow then after trying several decide the one they started wanting doesn't rank anywhere near their top pick after handling and shooting several bows. The main reason I scratched through Barnett is quality issues mainly with strings and cables on too many of them also most other makes have scopes with pretty well regulated aiming lines in the scope for about 10 yard increments, not so with the Barnett scopes and bows. Stryker is another brand with many returns, though they seem to have fixed a lot of those with the new Solution bow for 2014, only time will tell if that is true.
Hard to go wrong with TenPoint, Wicked Ridge, Excalibur. Parker, Darton and Carbon Express those IMO are all good choices with enough variation in models and features to keep a person busy fir a while trying to find the right one.