Re: 7mm-08 and H380 powder
I have 7mm-08's both short 20" and 21" in length. I used H-414, IMR-4064, WW-760, and Big Game recently. I have used H-380 but it does have pressure issues at the top when temps rose above 65 deg for me.
@42.0 grains of Varget under most 140's works well just have to adjust overall length if magazine allows.
I really like Big Game or WW-760 w/CCI mag primers under the 145 Speer Hot-Core for a woods load.
Varget, BR-2's and the 120 TTSX is great load too.
Great round, learn to anneal necks and keep trim to length if not change your brass out after 3-4 firings or you will get neck cracking if running top loads.