This product listing is exclusively for a funnel, no heads are included. It is intended for those who either require an additional funnel for an existing set or wish to economize by reloading a single caliber. Interchangeable heads can be added here. Consider the reloader kit, which includes the funnel and six heads, the master kit, which comprises six heads and a storage block or the ultimate kit, which encompasses the entire master kit plus a 50-place cartridge reloading block engraved with your chosen caliber. The Area 419 billet aluminum powder funnel employs a system of interchangeable, caliber-specific heads, making it the premier funnel for reloaders available today. This system addresses several issues associated with universal plastic powder funnels. The interchangeable heads of the Area 419 funnel thread onto the funnel and are specifically designed for each caliber's neck diameter. They do not rely on fitting over the case body to remain in place. Instead, they are slightly larger than the neck diameter to ensure a secure fit on the case. Each head features a bore that is a few thousandths of an inches smaller than the bullet diameter, optimizing flow for each caliber. This feature is particularly beneficial for users of super ultra magnum calibers (e.g., .375 Cheytac, .408 Cheytac, .50 BMG). The interface between the heads and the funnel is engineered to prevent any kernels from becoming lodged between the two, provided the head is fully tightened. The external flutes are primarily for aesthetic purposes, however, internally, they function to disrupt the powder kernels, preventing them from clogging at the neck It also provides additional airspace to prevent excessive compaction, thereby enhancing the flow through the nozzle A 3/8 inches tall straight section is incorporated at the top to minimize the risk of powder kernels bouncing out during pouring The precisely engineered smooth surfaces at the funnel neck and interior head facilitate rapid flow dynamics and effectively mitigate kernel adhesion