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Lyman
The Lyman 7777785 primer pocket reamer is a large-size case prep tool built to handle one of reloading's critical foundation tasks: cleaning and uniforming the primer pocket before you seat a fresh primer. Whether you're prepping rifle brass for precision handloads or running volume through a progressive setup, this tool removes the burrs and deformation left behind after decapping, plus it's stout enough to tackle military-crimped primer pockets that would give standard tools a hard time. It's the kind of straightforward, hardworking piece of equipment that separates clean, reliable reloads from mediocre ones.
Built with an ergonomic, cushioned polyurethane handle, the reamer is designed for comfort during repetitive use—a detail that matters when you're prepping dozens or hundreds of cases. The handle is built to last, and so is the cutting geometry; Lyman designed this tool to work reliably through thousands of cases without sacrificing its edge or requiring constant replacement.
If you're serious about reloading quality, primer pocket prep is non-negotiable. Uniform pockets ensure consistent primer seating depth, which translates to more predictable ignition and tighter shot groups. This reamer handles both the routine cleaning and the stubborn military crimp, making it a sensible addition to any reloading bench.
| Brand | Lyman |
| Model Number | 7777785 |
| Tool Type | Primer Pocket Reamer |
| Size | Large |
| Handle Material | Ergonomic polyurethane |
Yes. The Lyman 7777785 is strong enough to cut through military-crimped primer pockets with a few twists, making it suitable for prepping once-fired military brass or commercial ammo cases with aggressive crimps.
The Lyman 7777785 is sized for large primer pockets, which are found in magnum rifle cartridges and most large rifle cases. If you're prepping small-primer brass, you'll need a small-size reamer instead.
The Lyman primer pocket reamer is one tool in the case preparation process. It's often used alongside other tools like primer pocket cleaners and flash hole tools to fully uniform a primer pocket before seating new primers.
Lyman
The Lyman 7777785 primer pocket reamer is a large-size case prep tool built to handle one of reloading's critical foundation tasks: cleaning and uniforming the primer pocket before you seat a fresh primer. Whether you're prepping rifle brass for precision handloads or running volume through a progressive setup, this tool removes the burrs and deformation left behind after decapping, plus it's stout enough to tackle military-crimped primer pockets that would give standard tools a hard time. It's the kind of straightforward, hardworking piece of equipment that separates clean, reliable reloads from mediocre ones.
Built with an ergonomic, cushioned polyurethane handle, the reamer is designed for comfort during repetitive use—a detail that matters when you're prepping dozens or hundreds of cases. The handle is built to last, and so is the cutting geometry; Lyman designed this tool to work reliably through thousands of cases without sacrificing its edge or requiring constant replacement.
If you're serious about reloading quality, primer pocket prep is non-negotiable. Uniform pockets ensure consistent primer seating depth, which translates to more predictable ignition and tighter shot groups. This reamer handles both the routine cleaning and the stubborn military crimp, making it a sensible addition to any reloading bench.
| Brand | Lyman |
| Model Number | 7777785 |
| Tool Type | Primer Pocket Reamer |
| Size | Large |
| Handle Material | Ergonomic polyurethane |
Yes. The Lyman 7777785 is strong enough to cut through military-crimped primer pockets with a few twists, making it suitable for prepping once-fired military brass or commercial ammo cases with aggressive crimps.
The Lyman 7777785 is sized for large primer pockets, which are found in magnum rifle cartridges and most large rifle cases. If you're prepping small-primer brass, you'll need a small-size reamer instead.
The Lyman primer pocket reamer is one tool in the case preparation process. It's often used alongside other tools like primer pocket cleaners and flash hole tools to fully uniform a primer pocket before seating new primers.
