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Redding Reloading Equipment
The Redding GRX Push Thru Base Sizing Die is built specifically to solve a common problem in 40 S&W reloading: the bulge that forms near the case base after firing. Unlike conventional sizing dies that only work from the top down, this push-thru design passes the case completely through the die, removing stubborn base bulges that standard dies leave behind. If you reload 40 S&W and have noticed your brass getting harder to chamber or developing that telltale swelling, this die restores compromised cases to service—saving you brass and keeping your reloading costs down.
Brass that's been fired in 40 S&W chambers often develops base bulging due to chamber dimensions and pressures. Left unsized, that bulge makes cases difficult to reload and eventually unreliable to shoot. The GRX push-thru approach addresses the root of the problem: instead of trying to size around the bulge, it eliminates it by allowing the case to travel all the way through the die. The result is brass that sizes down cleanly and is ready for a fresh load.
Reloaders who work with 40 S&W—whether for competition, duty pistol practice, or personal defense loads—often reach for the GRX when their brass starts showing base bulge. It's a targeted solution that extends brass life and keeps your loading bench more efficient. If you've been scrapping otherwise good 40 S&W cases, this die offers a practical way to bring them back into rotation.
| Manufacturer | Redding |
| Product Line | GRX |
| Type | Push Thru Base Sizing Die |
| Caliber | 40 S&W |
Base bulge is a swelling that forms near the bottom of a 40 S&W case after firing, caused by chamber dimensions and pressure. Standard sizing dies work from the top of the case down and don't always reach the base, leaving the bulge intact. Over time, this makes cases harder to reload and eventually difficult to chamber safely.
The GRX allows the entire case to pass through the die, addressing bulges at the base where conventional top-down sizing can't reach. This complete pass-through sizing eliminates the bulge and restores the case to proper dimensions.
The GRX push-thru base sizing die is currently available only for 40 S&W.
The GRX is designed to address and eliminate base bulge. If your 40 S&W brass shows no bulge issues, a standard sizing die will work for your reloading process.
Redding Reloading Equipment
The Redding GRX Push Thru Base Sizing Die is built specifically to solve a common problem in 40 S&W reloading: the bulge that forms near the case base after firing. Unlike conventional sizing dies that only work from the top down, this push-thru design passes the case completely through the die, removing stubborn base bulges that standard dies leave behind. If you reload 40 S&W and have noticed your brass getting harder to chamber or developing that telltale swelling, this die restores compromised cases to service—saving you brass and keeping your reloading costs down.
Brass that's been fired in 40 S&W chambers often develops base bulging due to chamber dimensions and pressures. Left unsized, that bulge makes cases difficult to reload and eventually unreliable to shoot. The GRX push-thru approach addresses the root of the problem: instead of trying to size around the bulge, it eliminates it by allowing the case to travel all the way through the die. The result is brass that sizes down cleanly and is ready for a fresh load.
Reloaders who work with 40 S&W—whether for competition, duty pistol practice, or personal defense loads—often reach for the GRX when their brass starts showing base bulge. It's a targeted solution that extends brass life and keeps your loading bench more efficient. If you've been scrapping otherwise good 40 S&W cases, this die offers a practical way to bring them back into rotation.
| Manufacturer | Redding |
| Product Line | GRX |
| Type | Push Thru Base Sizing Die |
| Caliber | 40 S&W |
Base bulge is a swelling that forms near the bottom of a 40 S&W case after firing, caused by chamber dimensions and pressure. Standard sizing dies work from the top of the case down and don't always reach the base, leaving the bulge intact. Over time, this makes cases harder to reload and eventually difficult to chamber safely.
The GRX allows the entire case to pass through the die, addressing bulges at the base where conventional top-down sizing can't reach. This complete pass-through sizing eliminates the bulge and restores the case to proper dimensions.
The GRX push-thru base sizing die is currently available only for 40 S&W.
The GRX is designed to address and eliminate base bulge. If your 40 S&W brass shows no bulge issues, a standard sizing die will work for your reloading process.
