i shoot a horton xbow..legend 175...i currently shoot the 100 grain buckmasters by american broadhead . they have come out with a new broadhead . 150 grain sonic exclusively for xbows . i only have afew years into xbows, so i m looking for info from the those with know . what will i gain with 150 grains vs. 100 grains. the 100 grain head grouped well out to 30 yrds at around 40 it opened up some..but i m no pro either .i ll call myself an average shooter at best . i shoot freehand , no rests.,thats how i hunt so i target shoot the same way . as for strings,,, is it normal for s string to wear out quickly ? i use horton strings, and it seems the servings never last me long..i do lube it every 6 shots or so ..thanks in advance .