I recently added a set to a Beretta 682 gold e sporting. Made the gun a pleasure to shoot. Use purple Loctite on the screws and add weight to stock for balance if needed. Well made product.I personally know a few shooters who use his weights, you should be happy with the product.
I used lead shot in a vacuum seal bag in the stock. Added and subtracted the amount of shot till I got the balance right. Not an original idea but works well.1/4” Brass rods work great in the stock for counterweight. Easy to adjust and clean. Tape together or use bubble wrap and or cardboard to snug up. I’ve used his brass weights and they are slick
The 2 main reasons are for recoil reduction, or to smooth out your swing for crossers, which is more of a skeet/sporting clays thing rather than trap.How do you determine when to add weight to the gun?