Right here.
It's a very good bullet for 1900+fps loads in the .45-70, stands up well to high impact velocity. I've run them into the mid 2200s without issue.
As far as the 60% H4895 load, I'd be inclined to use H or IMR4198 at the velocity you mention.
Even at full-snort loads with heavier bullets, the 4985s don't generate high pressure and tend to burn dirty. I've got one load pushing a 435 grain LBT at 1800+ fps, and the powder is just getting to the point of a decent burn at 32 KPSI. But the case is packed full! Any slower and it's dirty as hell, and 1800 fps, 435 grain loads KICK.
36 grains of either 4198 and Starline brass ought to put you just north of 1550 fps in a Guide gun. Recoil would be about 16 to 17 ft-lbs, something like a .308 Win. There are other powders that will do the same job, but I've not used them, so won't comment on or recommend them, but there are other guys here who have good recommendations.
Starline brass may not seal up at that low of a pressure unless you anneal, and if you used WW brass, velocity and pressure would both be lower, along with recoil. The cases may still be a little sooty.
Last edited by Vic_in_Va; 05/07/14. Reason: make post clearer