i've tried lost river bullets and would say they were the absolute worst shooting bullets i've ever tried.the owner worked with me to try and make them shoot.when i gave up on them,he refunded my money.what i know about copper bullets(any of them)is the fit to the barrel is critical.also if you have a bore that is larger at the muzzle,than at the chamber,they will never shoot.the groove bullet and g s customs are the best at killing game.the gs can be shot faster than any other bullet but can be tricky to get 1/2 moa or less.the groove bullets are very accurate,but have a very limited selection(one per cal.)i think the barnes is the bottom of the heap.don't get me wrong,they're better than lead bullets when it comes to terminal performance,they're great killers.i just think the others are better because they shed their pedals and slam through with a one dia. instead of mushrooming.