Nubo, I see what you mean. The 340's are definatley reccomended for my bow @ 70lbs. I see that there are however different gpi on the different arrow types. The arrow I am now presently shooting is 8.7 gpi. I'm using a 28.5" shaft so that gives me a 347.95 grain arrow with the tip? I'm supposing that my draw weight is 72lbs with a 29"draw length. So, I should be shooting no less than 360g if that is the case?
So, if I go with some of the 340's that are 9.5gpi then I will be somewhere around 370.75 with the tip.
If I remember correctly some of the 340's were 10.5 gpi., which would give me an arrow of about 400g. So I'm wondering whether to go with the 9.5gpi or go heavier. I may buy 3 of each and see how it goes.