Description
The 25 GT has earned a loyal following among precision and PRS crowds who want a 25-caliber round that splits the difference between a 6mm and a 6.5mm, and this RCBS MatchMaster Duo set is built to feed that habit. It's a clean two-die package that handles the two jobs that matter most on the loading bench: full-length sizing and precise bullet seating. Since the 25 GT is a wildcat built off 6 GT brass necked up to .257, having dies made specifically for it takes a lot of guesswork out of the equation.
What the MatchMaster Duo 25 GT Set Brings to the Bench
The star of the show is the MatchMaster seating die with its micrometer top. Dial in your seating depth, write down the number, and you can return to that exact setting any time without hunting for it again. That repeatability is what separates a frustrating load session from a smooth one, and it's the same seating die RCBS puts in its higher-end competition sets. Paired with it is a trusted RCBS full-length sizing die that brings your fired brass back to spec and resets the shoulder for reliable chambering.
No Bushings, No Fuss with the 25 GT Duo
One thing worth calling out is that this Duo set uses a standard non-bushing full-length sizer. That means there are no bushings to purchase, measure, or keep track of. You pull it out of the box and get to work, which is a nice change of pace if you'd rather spend your time loading than sourcing accessories. The dies use the standard 7/8-14 thread, so they'll thread right into any common single-stage or turret press.
Built to Last and Backed by RCBS
RCBS has been making reloading gear for generations, and the MatchMaster Duo carries that reputation forward. It's made in the USA and backed by RCBS's limited lifetime warranty, so the set should outlast plenty of barrels. For anyone running a 25 GT and wanting match-ready results without a cabinet full of bushings, this is a straightforward, well-built answer.
Key Specifications
- Manufacturer: RCBS
- Cartridge: 25 GT
- Die Style: 2-Die Set
- Dies Included: MatchMaster Seating Die + Full-Length Sizing Die
- Seating Adjustment: Micrometer-Adjustable
- Bushings: None Required (non-bushing sizer)
- Thread: 7/8-14
- Material: Steel
- Country of Origin: United States
- Warranty: Limited Lifetime Warranty
- Manufacturer Part Number: 23404
- UPC: 850079710214
What’s Included
- RCBS MatchMaster micrometer-adjustable seating die
- RCBS full-length sizing die
Frequently Asked Questions
Does the MatchMaster Duo 25 GT set require bushings?
No. This Duo set uses a standard full-length, non-bushing sizing die, so there are no bushings to buy, measure, or swap. That's the main difference between the Duo and the bushing-style MatchMaster Competition sets. You can start loading right out of the box.
What dies come in the RCBS MatchMaster Duo 25 GT set?
You get two dies: the premium MatchMaster seating die with a micrometer top for repeatable seating depth, and a trusted RCBS full-length sizing die. Together they cover both key steps for building 25 GT ammo. The seating die is the same high-end unit found in RCBS's competition sets.
Will these dies fit my press?
Yes. The dies use the industry-standard 7/8-14 thread, so they'll thread into virtually any common single-stage or turret reloading press. If your press takes standard dies, you're good to go.
What is the 25 GT cartridge and who is it for?
The 25 GT is a 25-caliber wildcat commonly formed from 6 GT brass necked up to .257, and it has gained traction with precision and PRS competitors looking for a round between a 6mm and 6.5mm. Because it's a wildcat, handloading is part of the deal, which makes a dedicated die set like this one essential. This Duo set is aimed at reloaders who want match-grade consistency for that cartridge.




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