Hmmm.... multi-facted questions are never easy.... Yes, one arrow could do both pretty well. However, the 125 grain broadhead will most likely be a limiting factor in making this happen. With 125 grain heads the 70# will likely need a 300 spine arrow, and the 60# will need a 340 spine. The Gold Tips you have are probably 55-75, which are 340 spine (roughly). This would make them OK for the 60# DXT and the 125 grain tips if the tuning on the bow is really good; any tuning flaws will make this combo show up as underspined (not flying well), but a lighter head will render the 340 spine very forgiving. The one cam designs have a radical cam that pushes them towards a higher spine arrow for that heavy of a head. The 70# bow is underspined at 125 grain heads, but it will fly great with an 85 grain head and marginal with a 100 grain head. My opinion is that your best bet is to use your existing Gold Tip arrows with the 60# bow with 100 grain heads and then get 300 spine arrows for the 125 grain heads with the 70# bow. The Gold Tips made more than 2 years ago are still the ones that were made in America, and they are good, but the newer ones are made in Mexico, and they aren't worth buying at any price. Again, just my opinion, but it's based on experience with that same problem.
