I agree that foc isn' t as critical if you are already getting good arrow flight,BUT imo,the lower your ke is,the more important it becomes for good penetration.Even if the arrows are hitting their mark,foc at 10%-12% should in most cases be OPTIMUM for penetration.



The real problem is with really low foc .Like 5% and yea there are some cases where people do it.30" arrows with 57 gr broadheads isn' t good for hunting.regardless of arrow flight.




Some will have a hard time getting foc above 10% with vanes but those people in general will be using longer arrows and therefore should have longer draws and that will give you plenty of ke so you don' t need to worry about it as much.I think you are in this category.You should be fine as long as the arrows are flying well.


This may not be an absolute but is a good rule of thumb to use.



Regardless of anything else,arrow flight is the most important for penetration and hitting your mark is the more important than anything else.That isn' t downplaying sharpness of broadheads or the design of them.