Well, my Centurion 99 G3, which used to go bang absolutely every single time with the right ammo, doesn't always dent the primers. I've tried cleaning and lubricating the trigger group, doesn't seem to help. Some of the ammo is a little dirty, and I thought maybe it gave so much resistance loading that the bolt didn't close completely, in which case I'm darn glad the pin didn't hit the primer. Well all the dirty Chilean 7,62mm Cartuchos de Guerra are gone, and now I only have European stuff with shiny cases, so maybe it'll clear up. If not, would it need a new firing pin spring? And now about accuracy: My groups have been expanding, not shrinking. Probably just me getting tired and impatiently forgetting to let the barrel cool for a minute or two, but are there any ways to specifically improve the G3's accuracy? Specific handloads? I use Winchester match, a Tasco 3-9x40mm, and a sandbag. It once gave me roughly 1moa. I'd like to do better. Of course I'm probably the part of the equation that needs the most improvement.