arrows?

[fryar34]

I have a 54 pound dark archer made by Bob Lee, it is at 27 inches and I am wanting to order some gold tip arrows for it from Bob Lee and them, and he said I need to shoot 35-55 with no brass insert or a 55-75 with a brass insert both with a 125 grain field point. I dont understand this why would I put a brass insert in a heavier arrow and not the lighter arrow, I thought the whole point of a brass insert was to make the arrow heavier, he told me it was because the dark archer is so fast, that the 35-55 will penetrate good with the speeds I will be getting out of that bow. Anyways can someone explain this to me, I would greatly appreciate it.

[McDave]

I think the advice is good, but the reasons for it are wrong.

The 3555 has a weak shaft.  If you put more than about 125 grains on the front of it, the shaft will be too weak for your bow and will not fly well.  Even 125 grains may be too much for a 54# bow (assuming you're drawing it to the full 54#); you may need 100 grain points.  You can't add weight to the back to make the arrow stiffer, because then you wouldn't have sufficient FOC.  Because this will be a lightweight arrow, it will not penetrate well, and should not be used for hunting big game.  On the other hand, it will be fast and flat, and would be a good target or 3D arrow.

The 5575 is a stiffer shaft, and you will need to load weight on the front or it will be too stiff for a 54# bow.  If you want an even heavier arrow, you can add weight to both the front and back to keep the arrow's spine right for your bow.  You should consider using a 150 grain broadhead, and reducing the brass insert weights, as then you would have a stronger broadhead, and you need the weight up front anyway.  You can use 145 grain field points, as you will probably end up sharpening off 5 grains from the broadhead anyway.  This will make a good heavy hunting arrow.  Not so good for targets or 3D.