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<blockquote data-quote="dstancu" data-source="post: 3081058" data-attributes="member: 9273">I would respectfully disagree. There is a problem, albeit for just a subset, or a fraction of people handloading.The reason many users of belted cartridges never noticed that they needed to resize the web area of the wall (right above the belt) is simply because their rifles were chambered a bit loose, or closer to the max tolerances of SAAMI for that chambering. That way, the web (where the case is the thickest and the strongest), never expanded enough (bulged) to become difficult (or even impossible) to chamber. Important note: standard FL (full length) resizing dies do resize the full cartridge, but to a much lesser degree in the lower part of the wall. Small base FL resizing dies do a slightly better job at constricting back to specs the area in question. But especially when using neck sizing dies, nothing touches the lower part, and it keeps bulging until unusable.Especially in the case of rebarelling with higher quality barrels, the chamber is cut tighter, closer to the minimum SAAMI specs.The web area bulging problem is a lot less common on beltless cartridges, where the FL resiging does an adequate job at controlling the dimensions.The Larry Willis die was designed especially to constrict mostly the lower part of the case wall above the belt before it has become too large in outside diameter. The beauty of the die is that one can use the other end as a gauge to determine which cases need the resizing with the specialized LW die.Different cases (manufacturers) have different metallurgy, some are more prone to expand than others: my Hornady 300WM require the LW die quite often, while my Peterson 300WM do not.</blockquote>

[QUOTE="dstancu, post: 3081058, member: 9273"] I would respectfully disagree. There is a problem, albeit for just a subset, or a fraction of people handloading. The reason many users of belted cartridges never noticed that they needed to resize the web area of the wall (right above the belt) is simply because their rifles were chambered a bit loose, or closer to the max tolerances of SAAMI for that chambering. That way, the web (where the case is the thickest and the strongest), never expanded enough (bulged) to become difficult (or even impossible) to chamber. Important note: standard FL (full length) resizing dies do resize the full cartridge, but to a much lesser degree in the lower part of the wall. Small base FL resizing dies do a slightly better job at constricting back to specs the area in question. But especially when using neck sizing dies, nothing touches the lower part, and it keeps bulging until unusable. Especially in the case of rebarelling with higher quality barrels, the chamber is cut tighter, closer to the minimum SAAMI specs. The web area bulging problem is a lot less common on beltless cartridges, where the FL resiging does an adequate job at controlling the dimensions. The Larry Willis die was designed especially to constrict mostly the lower part of the case wall above the belt before it has become too large in outside diameter. The beauty of the die is that one can use the other end as a gauge to determine which cases need the resizing with the specialized LW die. Different cases (manufacturers) have different metallurgy, some are more prone to expand than others: my Hornady 300WM require the LW die quite often, while my Peterson 300WM do not. [/QUOTE]

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