Thinking of trying Staball HD in my 7RM with 26" barrel. Anyone tried any loadouts in 7RM with this stuff? I currently use H1000 exclusively because my rifle hates Retumbo and RL26 can't be found. My barrel copper fouls with a vengeance every 30 rounds or so, so I thought I'd give the Staball HD a go if it'll run decent in 7RM. Any experience with it is appreciated.