a friend of mine, african PH, is making researches about the best african arrow buff criteria...
of course, he is completly convinced by all the ashby's conclusions and results: EFOC; COI tanto 3/1 grizz BH; ferule diameter's larger than shaft's diameter; arrow flechting and single bevel compatability; arrow heavy weight, etc.He has himself made penetration's tests in caffer buffs which claim some huge penetration differences' between the niddle and the tanto grizzly tip design when all the other ashby's factors are respected...
So there is the question: without any consideration about the poor trajectory quality which could result; without any consideration about the bow efficiency variations wich could result; can we consider that increasing undefinetly the weight of an ashby arrow would undefinitely increase the arrow's penetration when this arrow is shot with the same bow, at the same draw length and weight?...in other words, do a 1300 gr arrow perfectly tuned will penetrate more than the same 900gr arrow, perfectly tuned, when it is shot with the same bow...for instance with my 65#@29 ACS I get 0.78sfs with a 1330gr arrow and 0.61sfs for a 960gr arrow: can I be sure that the 1330gr will penetrate deeper than the 960 arrow or is there a downside to increase so much the arrow weight?
sorry for my poor american writing...