I`m using GT 7595`s with 74 pound dw @ 28 1/2 dl
ORIGINAL: GMMAT
Unless your arrows are in the same vertical plane.....and off 7" in THAT regards....."I" can see NO REASON why they would be "off" otherwise by simply changing tip weight.
Edit** I'm acting under the assumption that your arrow is spined correctly (or will handle)for either tip weight.