One aspect of reloading I do not understand yet is how to choose the right primer for your load. There are many different manufacturer's and many different types of primers for the task at hand. For example, I have been loading for 44 mag. Some loads use large pistol primers and some use large magnum pistol primers. Some people say it doesnt matter and some say it's the difference between a good shooting group and dissapointment.
I have used Remington, CCI, Winchester, and Federal primers but I do not have enough experience between these brands with each round I load for to tell the difference.
Is choosing a primer for your load more of a trial and error learning experience or should a reloader stick to the data down to a T? Between the different primer manufacturer's how do you choose the right maker? Is it safe to use a non mangum primer if a magnum rifle or visa versa?