hey guys i am developing heavy arrows for african plains(zebra, kudu, gemsbock, and maybe eland) am looking at 3 good shooting arrow 685gn- 160 grizz, 50 gn brass insert, 100 gn steel adapter, 27 in beman ics 300 with gold tip nock adapter and 20gn weight, 3 feathers/ 655gn- alum insert, 160 grizz with 100gn steel adapter same arrow and nock wt/640gn 145 grizz with 100gn steel adapter otherwise same. all three shoot good pattern thru paper. was only able to bare shaft tune to 240 gn head wt due to lack of field tips but had perfect tuning with that set up. all three shoot low 150s at 27 in draw..recs?