With 180's I have used H1000 and Reloder 26. I get about 75-100 fps more with Reloder 26, and in my case got better accuracy and lower s.d., but H1000 has produced some good results for other people. With a 26" barrel, expect 2900 or better with 180's. If you use Reloder 26, it is very possible you will get 3000 or better. Currently shooting HBN coated 180 VLD's at 3060 fps out of a 26" Remington 700 long range.
On a side note, I have also used these powders with 175 eld-x, 168 vld's, and 162 eld-x out of a couple other rifles, and both work well, good accuracy and consistency, just flip flops which one gets lower s.d.'s and better accuracy depending on the gun, but Reloder 26 is always faster.