I was just thinking about some of these new bows posting 350+ fps ibo ratings and was giving some thought on what arrows some would use at the 70# 30"+ range.Most arrows on the market just won't cover it for perfect spine match for broadhead tuning,then I remembered that Easton has some new big game FMJ's out.
So I went and checked them out and I was floored at the weight some could build these things up to without doing anything special.Check out some of the specs.
http://www.eastonarchery.com/products/product/58
Take a 30" draw and that would be somwhere around a 29" arrow,the new FMJ .250 weighs in at 17.2 grains.
17.2 X 29"=498.8 RAW SHAFT[
]
125 grain broadhead
75 grain EASTON HIT insert(no aftermarket acc.)
20 grain tracer nocks
8 grain feathers (my preference)
so
498.8
+125
+75
+20
+8
---------
=726.8 grains
With very little work,you could bump this even more but this is just using available easton acc. wow.