What is the differance and purpose of the Accutip, failsafe, balistic silvertip, partition gold, and power point bullets?

Most of the plastic tipped bullets (ie: Nosler Ballistic Tip, Winchester Ballistic SilverTip, Swift Scirroco, etc) were designed to eliminate lead bullet tip deformation upon chambering. The hard plastic tip won't deform during loading, thus increasing accuracy at long range, and also helps expedite expansion. The plastic tip jams back into the lead on impact making this type dynamite on deer sized game. On the other hand, bullets like the Winchester FailSafe, Swift A-frame, and Trophy Bonded are made to expand slowly and maintain a higher percentage of their initial weight providing deep penetration and more likely giving you an exit hole on every shot. They're usually recommended for larger game such as elk or moose, or in cases where the extra hole in the hide will make tracking easier.

Actually the Swift Scirroco, Nosler Accubond and Hornady Interbond are bonded bullets meant to retain weight and provide good penetration, so while some of the charcaterstics do resemble the Ballistic Tip style bullet they are very different in terms of design and use for bigger game such as moose and elk.

The plastic tips were developed using the experience gathered from Remington's old Bronze Tip ammo, the purpose is to keep the slick ballistic shape, and still promote rapid expansion upon impact. Bonded cores are an attempt to keep the lead core from seperation from the cupro-nickle jacket. The Partition solved this problem by putting a partition between the tip and the bulk of the core. With the Ultra Magnums impact velocities on short range targets got so high as to cause the Partitons to rivet and otherwise fail to preform as before. In addition to that some folks didn't like the fact that the first 1/3 of the bullet tended to disappear. The Failsafe, Partition Gold, etc. are designs to keep these ultra high impact velocities from causing bullet failure. Some bullets are homogenous, which prevents the shedding of the cores. The use of these bullets in cartridges not needing the extra design features, beyond the early Partitions is a result of advertising. I like a couple of the old cup type bullets for my .260 as the velocity never exceeds their capablilties.