257 SAUM Reamer?

[DLJ6]

Gang,
Ive got my mind set on a 25 SAUM project for 2025 and have already started collecting components. As of now I am thinking of using a Kauger VPR SA and a HCA 7 twist barrel finished to around 22".
Ive done a couple of searches but not turning up reamer options. Does anyone know sources for a reamer?
Any assistance is greatly appreciated.

 

[Blaster 1]

Gang,
Ive got my mind set on a 25 SAUM project for 2025 and have already started collecting components. As of now I am thinking of using a Kauger VPR SA and a HCA 7 twist barrel finished to around 22".
Ive done a couple of searches but not turning up reamer options. Does anyone know sources for a reamer?
Any assistance is greatly appreciated.

Dl I have a 25saum reamer for the 131blackjack let me know if you want to borrow it

 

[DLJ6]

Dl I have a 25saum reamer for the 131blackjack let me know if you want to borrow it

Thanks blaster, I will gladly comp you a rental fee. What COAL , CBTO are you running and have you tried any of the newer 130 class bullets in your rifle?

 

[lancetkenyon]

I don't have a 25 SAUM, but I do have a 26" 25SST and 22" 25PRC/SI.

Your twist rate is good. You could go to a 1:7.5" and still be fine.

I have tried most of the newer heavies. 131 Sierra Match King
133 Berger Elite
135 LR Hybrid
138 A-Tip

I haven't tried the 134 ELD-M yet.

My final loads are as follows:
26" 25SST 133 @ 3311fps over H1000
22" 25PRC/SI 133 3212fps over RL23

You should make 3100-3200+ with the 25SAUM in a 22" depending on bullet and powder combo.

 

[DLJ6]

I don't have a 25 SAUM, but I do have a 26" 25SST and 22" 25PRC/SI.

Your twist rate is good. You could go to a 1:7.5" and still be fine.

I have tried most of the newer heavies. 131 Sierra Match King
133 Berger Elite
135 LR Hybrid
138 A-Tip

I haven't tried the 134 ELD-M yet.

My final loads are as follows:
26" 25SST 133 @ 3311fps over H1000
22" 25PRC/SI 133 3212fps over RL23

You should make 3100-3200+ with the 25SAUM in a 22" depending on bullet and powder combo.

Thanks Lance.
Whose barrels are you running and did you build both on the same action, Bdl or detach box?

 

[lancetkenyon]

25SST is a Proof on a Kelbly Atlas Tac. DBM in a Manners EH1

25PRC/SI is a Benchmark on a Kelbly Atlas Lite, Hawkins Hunter DBM

 

[lancetkenyon]

These are all 6.5 versions, but show case sizes.
PRC, PRC/SI, SS, SAUM

SST, SS, SAUM, PRC, PRC/SI, WSM

 

[DLJ6]

Thanks much. Yeh it was a toss up for me since I also shoot 300 SAUM and 6.5 PRC and have quality brass for both but a friend / member here offered me a good deal on a set of Redding 25 SAUM dies.

 

[lancetkenyon]

Thanks much. Yeh it was a toss up for me since I also shoot 300 SAUM and 6.5 PRC and have quality brass for both but a friend / member here offered me a good deal on a set of Redding 25 SAUM dies.

Great reason to build a new rifle!

Heck, I had a spare BixN Andy Tac Sport Pro trigger in my safe, and had to build a whole new rifle just to use it!

 

[DLJ6]

Great reason to build a new rifle!

Heck, I had a spare BixN Andy Tac Sport Pro trigger in my safe, and had to build a whole new rifle just to use it!

Yeh….I've read warnings around here about trying to keep up with you!!

 

[Blaster 1]

Thanks Lance.
Whose barrels are you running and did you build both on the same action, Bdl or detach box?

 

[lancetkenyon]

Yeh….I've read warnings around here about trying to keep up you!!

They are all true...

 

[OrionsStar]

 

[sable tireur]

It never ceases to make me chuckle, when I'm looking for one thing I stumble into another or even two somethings I wasn't looking for.

I found my first batch of 6.5 GAP 4S brass made from original Remington 7mm SAUM brass, necked turned and all. This was made at a difficult time since we used up all the 7mm SAUM available and had to convert .300 SAUM and do some significant neck turning to make the neck diameter fit the chamber. Then the .300 SAUM supply ran out and we were finally forced to wait for the Hornady factory to finish up the design of their production line and fit the runs into their schedule.

Right under that box was the first batch of Hornady factory 6.5 GAP 4S brass from the first run from that factory. We had ordered 15,000 pieces which went to fill all the backorders of which I got 200 pieces. Others waited for the next run which was 20,000 pieces and went to fill all the other orders with only a few pieces left.

I was actually looking for the factory brass I had converted from the 6.5 to .25 SAUM which I eventually found along with the 6.5 WSM brass and the .25 WSM brass.

I consider the .25 SAUM/6.5 SAUM (GAP 4S) to be two of the easiest cases to develop loads for especially with the heavy for caliber bullets.

Currently I'm working on a couple of projects for those long .25 caliber bullets:

.25 PRC

.25 GT

Both have made it through testing so I build a couple more, one each for hunting and one each for targets.