RE: 100 grain vs 125 grain
This is why I plan to go to 63 lbs with my new heads and arrows. The 125s would be too heavy for the 200 arrows to deal with (underspined) at 59 Lbs. But the 300s would be a bit OVER-spined at 59 Lbs even with the 125gn heads...so I need an extra 4 lbs to make it " perfect" according to " The archery Program" at least.