Originally Posted by
Fox
Here is the thing, at the moment the primers that you should use are simply the ones that you can get. Last spring I wanted to get more Win Large Rifle primers, they did not have any in stock as almost everything was gone, so I went with Win Magnum Large Rifle primers. Since I am building loads up from scratch it really does not matter if I use regular or magnum primers.
Winchester primers are the hottest primers out there, their large rifle is the hottest of the large rifle and the magnum is the hottest of the magnum but not all that much hotter than the standard winchester primers.
Remember, you cannot just swap a primer or a case and be safe, you need to develop a load with all the components you are using, even minimum book loads need to be tested, with some brass, primer and powder combinations the minimum book load may be borderline with your rifle.
H4895 is a great powder that can be used for a pile of things, but good luck finding any right now.