I have to admitI've used a lot more Sierras than anything else. Mostly because back in 1954 when I started reloading, Sierra's were cheaper than Speer or Hornady, probably because they were made in Southern California back then and shipping was probably less. Even after I left California I was used to Sierras and how they worked so never much bothered with the other brands. Hunted most deer and not much else, not counting jackrabbits and the like.
Bought a rifle that I got quite cheaply because the previous owner said it was inaccurate and he couldn't get it to shoot anything. I figured if I could find a load that would do 1.5" or less consistently I'd keep it. I tried all kinds of powder and bullets appropriate to the .308 Win. and then some powders not so appropriate. One finally worked, a 165 gr. Speer Hot Core over a stiff load of W760. Only did 2550 FPS from the rifle's 18.5" barrel but I got my 1.5" or less consistently and deer from about 30 feet away to out at 250 yards died very conveniently.
Worked up a load with the 200 gr. Hot Core for my Roger #1B in 300 Win, Mag. that also worked in a Winchester M70. Dropped a cow elk at 530 lasered yards with that load. Been playing with some 150 gr. Grand Slams looking for loads for the 7x57 and .280 Rem. and have a couple hundred 250 gr. Grand Slams for my .35 Whelen to play with. Too many loads to work up and not enough time to do it.
Paul B.