A SECRET WEAPON FOR H4895 POWDER

How adaptable and effective are Varget and H4895? This may differ by cartridge and bullet body weight, not surprisingly, but some summary points can be gleaned from the information.I'm however looking to sort out a powder and load for my .308 BLR. I had been wanting to know which powder of the two (IMR4895 and H4895) you should opt for?Hodgdon H489