I am going to have a custom long range rifle built this spring and there are several options that I am considering. I al looking to have a gun built that once a scope is put on it will weigh 10 1/2 lbs in either a 7mm Remington Magnum or a .300 Winchester Magnum. I will either shoot a 168 or 180 grain Berger VLD out of the 7mm or a 210 Berger VLD out of the .300. My problem is that I will be hunting both species of deer, elk, and bears with my gun. I like the idea of having a 210 gr. bullet but I would have a muzzle break put on it. My concerns with the muzzle break are that they are extremely loud and I have heard of reduced accuracy out of them. I am leaning toward the 7mm for this reason. Does anyone have any input on these calibers and bullets and there killing ability for these animals?