RE: Price of new bowtech limbs
If you go up to 70# you will probably have to get different arrows to keep the spine correct. But a more important thing to consider is "will the extra poundage hurt my accuracy"? What about that real cold morning when you didn't get quite enough rest the night before? You didn't state what your arrow weight was, adding a little weight would increase the KE but really, you should be fine at 30 or even 40 yards with a well placed shot.