HS7Hawker Siddeley 748
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The fast-burning powders that hand-loaders often find so satisfactory for revolver loads--Unique, Blue Dot, HS6, HS7, Norma R-123--are not compatible with the rifle.
We'd recommend you start by confirming that you are, in fact, using HS7, and that your powder charge is correct.
The lineup includes the company s first battery-powered Wi-Fi Speaker (Model H4 Portable), advanced Wi-Fi Sound Bars (Models HS7 and HS91) and the Streaming 3D Blu-ray Player (Model BP550).