I've done lots of handloading for 7mm's - mostly 7RM and 7WSM's. Were it me, I'd concentrate on H4831 with 140/150 gr pills and Magnum for 160's. H 4831 will work with the 160's, in fact has shot some of the smallest groups, but Magnum will get almost as small of groups but give 75-100 ft/sec more velocity. 72.0 gr Magnum in my current 24" 7WSM under a 160 Partition gets 3050 with sub MOA groups. 63.5 of H4831 under the same bullet nets 2950 and sub MOA.
I've had really good luck with IMR 7828 and Re 22 as well - but acheive the same thing with H4831 and Magnum so have switched to them and don't worry about temps.
