Sorry for the delay, just got back from a trip. I'm shooting a Savage model 12 with a 26in varmint barrel. I got the idea to use Retumbo from a local guy who shoots a 270 WSM with excellent results. The slower burning powders have yielded my best groups and velocities. I shot a little of the H1000 and it shot very good groups but ran out before I got any real load development done. The Retumbo load is running vey low ES and I have shot it from -5 dergrees to 86 degrees and had no variation in group or speed so I have settled on it till after hunting season. I tryed 100V with no luck and R17 had horrible groups but I have heard alot about it being the short mag. powder so I need to do some more work over a crony, I think I may have had them to fast to group well.
It seems eather they really like something or they don't. I have also only been shooting the 140 gr bullets I think the 130's may like something a little faster.
I would rock the H1000 since you already have it.