is regulated by the CIP. The CIP does not provide chamber dimensions for the .30 Super. Although cartridges are generally considered interchangeable, chambers conforming to the strict minimum chamber of the .30 Super may not be able to chamber the .300 H&H Magnum. Both cartridges are based on .375 H&H Magnum cartridge design which provides an increase in capacity over many other cartridges. They feature tapering bodies and very shallow shoulders which prevent them from headspacing reliably on their shoulders. The belt plays a useful role in these cartridges in that it provides a demarcation point for reliable headspacing of the cartridge. CIP compliant .300 H&H Magnum schematic diagram CIP compliant .30 Super schematic diagram {| class="wikitable" border="1" |+ Cartridge Dimension and Specification Conflicts Between the .300 H&H Magnum and the .30 Super |- | style="background: #eeeeee" width="200pt" | Dimension / Specification | style="background: #eeeeee" width="180pt" | CIP Dimension Index | style="background: #eeeeee" width="180pt" | 300 H&H Magnum Value | style="background: #eeeeee" width="180pt" | .30 Super Value |- | style="background: #eeeeee" | Base to shoulder length|| L1 || || |- | style="background: #eeeeee" | Base to neck length|| L2 || || |- | style="background: #eeeeee" | Height to belt|| E || || |- | style="background: #eeeeee" | Extractor notch ∅|| E1 || || |- | style="background: #eeeeee" | Extractor notch width|| e min || || |- | style="background: #eeeeee" | ∠ to belt|| δ || 35° || 45° |- | style="background: #eeeeee" | Shoulder ∠|| α || 17° 0’ 9” || 16° 56’ 59” |- | style="background: #eeeeee" | Pressure || Pmax || || |} Significantly the shoulder vertex calculated by the CIP for both cartridges is given as for both cartridges. As the CIP uses the shoulder vertex length as an index to provide correct headspacing for the cartridge, this indicates that the cartridges are dimensionally interchangeable. However, as the .30 Super is rated for a lower pressure, the .300 H&H Magnum cartridge should not be fired in a .30 Super. However, the .30 Super can be discharged in a .300 H&H Magnum rifle. As most significant difference between the cartridges was that the .30 Super was loaded to a far lower pressure than the .300 H&H Magnum. The .30 Super drove a bullet at while the .300 H&H Magnum was loaded with the same bullet at . See also .30-06 Springfield .300 Winchester Magnum .300 Weatherby Magnum .300