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The Basics, Starting Out
.338 Lapua Mag.
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<blockquote data-quote="AKI" data-source="post: 52597" data-attributes="member: 1060"><p>The 338 Lapua case was based on the 416 Rigby necked down and shortened, neck mostly. The Rigby was found too weak at the intended design pressure 470MPa, so the guys at Lapua redesigned the case from scratch. Later the army found the 470MPa too high, so for the CIP a max pressure of 420MPa was selected. Compare this to the 430MPa of magnum cases, 440 of Weatherby and 460MPa of the 300Ultra one can understand why such a large case as the Lapua seems slightly anemic. One should however keep in mind that the case is left as strong as it was designed. If one dares to enter the world ower the max loads in the manuals (max 420MPa), one will find that the potential of the standard case is sunstantial.</p><p></p><p>Gentlemen, I have followed this magnificent site for quite some time. I have now got my first reamer, a Lapua Mag Improved (+FL sizer reamer) of my own design and feel an urgent need to tap some of the potential of this site, and, perhaps with some luck, contribute with some minor point some day. AKI</p></blockquote><p></p>
[QUOTE="AKI, post: 52597, member: 1060"] The 338 Lapua case was based on the 416 Rigby necked down and shortened, neck mostly. The Rigby was found too weak at the intended design pressure 470MPa, so the guys at Lapua redesigned the case from scratch. Later the army found the 470MPa too high, so for the CIP a max pressure of 420MPa was selected. Compare this to the 430MPa of magnum cases, 440 of Weatherby and 460MPa of the 300Ultra one can understand why such a large case as the Lapua seems slightly anemic. One should however keep in mind that the case is left as strong as it was designed. If one dares to enter the world ower the max loads in the manuals (max 420MPa), one will find that the potential of the standard case is sunstantial. Gentlemen, I have followed this magnificent site for quite some time. I have now got my first reamer, a Lapua Mag Improved (+FL sizer reamer) of my own design and feel an urgent need to tap some of the potential of this site, and, perhaps with some luck, contribute with some minor point some day. AKI [/QUOTE]
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The Basics, Starting Out
.338 Lapua Mag.
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