25gr will slow the bow only 8-10 fps.
Using Hawke Optic ballistic software:
If you sight in at 20 yds, the difference at 50 yds will be about 0.6" to 1" for bow speeds from 350 to 400 fps.
Using Hawke Optic ballistic software:
If you sight in at 20 yds, the difference at 50 yds will be about 0.6" to 1" for bow speeds from 350 to 400 fps.