Ok, I think I have the concept down but thought I would ask. When you guys are talking about brass inserts, you are removing the alluminum ones up front and putting in heavy brass ones. I believe this is to acheive a higher FOC, but. The only inserts I can find are 100g, that seems to be a whole lot of weight up front or are those inserts trimmable down to say 50g?
Here is the thing, I got a customer that has been having a heck of a time getting his exacts to group at 40yds with the firebolts but they shoot fine with alluminums

He is thinking about the Boltcutters because of the 150g but thought that inserts would do the same thing, he really likes the exacts.
Please O great wise ones, give me some insight
RED