On DG.. we have mostly controlled feed rifles, 100% proven feed, 100% proven extraction, reloads that are not loaded to maximum. Stock have all been bedded, addition crossbolts fitted, and action screw tensions checked preseason, and again. As they are used a lot, actions and tension have all settled in, and now firm and consistent. Company and guide rifles are CZ 375 and 416, Kimber 375, Whitworth 375, Blaser 375, Heym 404, Rigby 416, Mauser 404, 458, Ruger 458lott, Winchester 416RM...
Problems we encountered have been; Kimber Caprivi 375 chamber too precise.. so some reloaded ammo would jam, gunsmith ran his reamer in out, fixed. A particular CZ 404 had 3 problems, so decided to sell rather than persevere.. and it also had prior a recoil reducer permantly glued in the stock and rifle was too heavy for caliber, as a carry rifle. A couple of CZ action and ramps have been polished to feed smoother. We have seen CZ and Ruger stocks start to split, so it's best to bed them and additional crossbolts, before hunting. Some makers stop making 416 Rigby and 458Lott calibers as too many stock recalls.