In rifles, the semi-point design allows this style of bullet to expand faster than a spitzer style due to a generous amount of exposed lead at the tip and the slightly larger opening in the jacket. Capable of outstanding accuracy, this bullet can be an excellent choice for varmints and small game in many early 22 centerfire rifles, which have slower twist rates than those commonly used today. The Semi-Point shape reduces bullet length for a given weight, making the bullet easier to stabilize. The penalty is that a Semi-Pointed bullet has a lower ballistic coefficient than a Spitzer-pointed bullet of the same weight. This bullet can also be used in modern rifles with faster twist rates.
In handguns, because of the velocity constraints caused by short barrels, the primary usefulness of a semi-point bullet design is in cases where the twist rate may not be adequate to produce the best accuracy with a spitzer bullet. The relative shortness of the semi-point design can improve bullet stabilization and accuracy. This bullet will not give explosive expansion at longer ranges, but due to the wide jacket opening and generous exposed lead tip can be useful at shorter ranges for fur bearers whose pelts are to be preserved.
For rifles, this 150 grain #2115 Full Metal Jacket Boat Tail bullet is designed for semi-automatic types, and it functions flawlessly in the M14/M1A, M1 Garand and similar rifles. The cannelure is located to provide an overall length suitable for both the 308/7.62 NATO and the 30-06 cartridges. This 150 grain FMJBT bullet also is a good bullet at medium and low velocity for hunting game with valuable pelts to be preserved.
In handguns, this 150 grain #2115 FMJBT bullet is ideally suited to the hunter who requires a non-deforming bullet to minimize pelt damage. Velocity should be kept low, and ranges must be correspondingly short to minimize damage to the pelt.
For rifles in 30 caliber, this bullet was designed for medium- to long-range hunting with cartridges having medium to large case capacities for powder. These bullets often display match grade accuracy from accurate hunting rifles. The famous Sierra Spitzer Boat Tail shape assures flat trajectory, excellent resistance to crosswinds and vertical winds, and maximum energy delivery to the target. Good penetration and expansion are characteristic of these bullets even at the reduced impact velocities at long range. With the weight range available, at least one of these bullets will prove ideal for almost any 30 caliber cartridge. The 150 grain #2125 bullet is best suited to medium game at all velocity levels.
In handguns chambering 30 caliber cartridges, prior to the introduction of the Remington Model XP-100 (and similar handgun designs) utilizing larger rifle cartridges, the usefulness of these bullets was limited. Now, these bullets have a very definite niche as superbly accurate hunting bullets. Previously considered "too hard" for expansion, they perform well at the 2500 fps muzzle velocities achievable in the 308 Winchester and larger cartridges. Ease of loading and precise concentricity contributes to their excellent accuracy. Sierra's Spitzer Boat Tail design assures flat trajectory and high energy delivery downrange with low sensitivity to crosswinds and vertical winds. These bullets are suitable for varmints through large game at all ranges a prudent handgunner would normally attempt.
In rifles, this 100 grain Spitzer bullet #1540 has a heavy, double-tapered jacket to ensure adequate penetration with reliable expansion on medium game. This bullet may be the correct choice for hunting large varmints as well as deer or antelope. It also may be the bullet of choice in some rifle's because its flat base construction enhances accuracy in that particular rifle.
In handguns, the 100 grain #1540 Spitzer bullet is too "hard" for use on field game due to the moderate velocities from all but the largest wildcat cartridges. However, this bullet will deliver to outstanding accuracy in long-range target competition and high momentum downrange for silhouette competition from handgun barrels with standard twist rates.
The #1540 was introduced in 1956.
The 150 grain #2130 has the Sierra's unique double-tapered hunting jacket that has been field proven under all conceivable conditions. The 150 grain #2130 bullet is best suited to medium game. This bullet is extremely accurate, providing an undeniable edge in the game fields. Reliable expansion and deep penetration blended with Sierra's classic Spitzer flatbase profile makes these the bullets of choice with many 30 caliber riflemen.
For handguns, Sierra's Pro-Hunter design is generally considered too "hard" for all but the most powerful of the 30 caliber handgun cartridges. Handguns chambered for the 308 Winchester cartridge or cartridges of similar size can use these bullets over maximum hunting loads at short range. Due to their flat base design, Pro-Hunter bullets are an excellent choice for a cartridge with limited powder capacity and a short neck, because these bullets intrude into the powder space less than a boat tail.