RCBS Alternate Bullet Seater Plug Features The RCBS Alternate Bullet Seater Plug comes in a variety of sizes to accommodate the most popular cartridge case calibers and this variant is built specifically for .40 S&W and 10mm Auto cases loaded with 155 grain Gold Dot bullets. Its through-the-top style design allows the plug to properly contact and seat the bullet s specific ogive profile something a generic seater plug can struggle to do consistently. The 1/2 inch-20 thread pattern matches RCBS seating die bodies allowing a straightforward swap without additional tools. Reloaders working with bonded or hollow-point projectiles like the Gold Dot benefit from a plug shaped to match the bullet s nose profile precisely. Like all RCBS reloading components this seater plug is machined to consistent tolerances supporting repeatable seating depth across a full batch of ammunition. Precise consistent seating depth is critical to maintaining safe pressures and reliable feeding in semi-automatic pistols chambered in .40 S&W or 10mm. Swapping seater plugs rather than purchasing an entirely new die set is a cost-effective way to expand load development options. The RCBS Alternate Bullet Seater Plug is a practical reloading accessory for sale at GrabAGun for handloaders working with 155 grain Gold Dot bullets. RCBS Alternate Bullet Seater Plug Specifications Manufacturer: RCBS Model: Alternate Bullet Seater Plug Reloading Caliber: .40 SW/10mm Auto Thread: 1/2-20 Bullet Weight: 155 Grain Available At: GrabAGun