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Hunting
Long Range Hunting & Shooting
Send It Vol 07 - +P throating
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<blockquote data-quote="Shawn Carlock" data-source="post: 1819833" data-attributes="member: 4"><p>Some what correct, you can use "unicorn" powder in a +P to realize max velocity. This was the case with 570 and the 338 Terminator round. The bottom line is if you have a load with powder x and shoot 90 gr @ 2800 fps, then cut the +P throat in the chamber pressure will drop as well as velocity to around 2700 fps. When you add powder to get back up to operating pressure you are back to sammi spec pressure but have used 3-5 gr more powder to do it. This results in 100-150 fps velocity increase with the same powder.</p></blockquote><p></p>
[QUOTE="Shawn Carlock, post: 1819833, member: 4"] Some what correct, you can use "unicorn" powder in a +P to realize max velocity. This was the case with 570 and the 338 Terminator round. The bottom line is if you have a load with powder x and shoot 90 gr @ 2800 fps, then cut the +P throat in the chamber pressure will drop as well as velocity to around 2700 fps. When you add powder to get back up to operating pressure you are back to sammi spec pressure but have used 3-5 gr more powder to do it. This results in 100-150 fps velocity increase with the same powder. [/QUOTE]
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Send It Vol 07 - +P throating
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