Dunno if the heavier broadhead shot better due to just being heavier.
Easy enough to check.
Add 25 gr to your insert and shoot the 125s again.
RPS (insert) usually drilled through for 8-32 and a GT weight should work.
Your bolts probably of larger OD/ID and if the insert drilled and tapped all the way through, can pop the nock and add weight to insert without risk of arrow damage (by pulling insert w heat).
Pro shop should have GT weights and the long allen wrench to put them in from the nock end.
