I like a twist per inch , your string has a length it should be , the maker of the string determines how many twists per inch it takes to get to that length , and a good string will remain farely stable .

If you have a dual cam , binary cam , or hybred camed bow , with a string and 2 cabels , twisting the string will not effect nock point , or very little with a hybred . A single cam bow is drasticly effected by string and cable length , and their lengths will effect nock point , one reason I stay away from them , Ive bought a few , cant believe I havent learned my lesson yet .