I’ve never tried the 125s, and have had great luck with the 100s. I’ve killed around 12-15 birds with them, and only had one bad experience with them. I hit a longbeard right at the base of the neck, with what I would have thought should be a killing shot. One of the blades broke off and the arrow bounced straight back, which would indicate a solid hit, not a glancing blow, IMO. It almost knocked the tom off his feet, but he staggered back a few steps, then simply walked off with the other Tom he was with.