Axcel Sight tapes

A year ago I was shooting a Mathews C4 not the fastest bow but I had Victory VAP at 287 grains my sight tape was No38 my sight was out 6 inch from riser
I now have a TRX 7 some what faster still with VAP but due to spine and FOC they are now 350 grain my sight tape yet again is 38 the only gain is one position outwards on my Axcel scope.
what is strange the sight tape set go up to 40 as both these bows ended up close to the top end I don’t see if everything is correct how anybody can get down into the 20 to 25 bracket which Axcel produce.
Is there anyone with a different opinion
 
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