Fast twist 25 cal real world data

[Mountainrancher]

I’ve got a real soft spot for the quarter bore and want to start gathering some components to put together a build. In the mean time I’m very interested to hear from any of you guys that have a fast twisted 25 shooting the 130+ grainers. What’s your cartridge, bullet, barrel length and velocity? Also what are you using to load some of the wildcat 25s out there?

 

[amassi]

25 prc
Lapua brass
6.5 prc bushing dies with a .283 neck bushing
23” barrel is 3200 fps
VV N565 and fed 210m


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[TxLite]

25 prc
Lapua brass
6.5 prc bushing dies with a .283 neck bushing
23” barrel is 3200 fps
VV N565 and fed 210m


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What bullet?

 

[willfrye027]

Couple of 25 creedmoors. 26” barrels 2820-2930 fps is the sweet spot. Berger 135s and hornady 134s. Very easy to load for, light recoil and good BC will carry velocity way out there.

 

[B23]

Getting ready to do a 25 SAUM. Have a new Bartlein 3B 5R inbound as I type and already have everything else I need except one of the most important pieces, the receiver, and I'm going back and forth on what I want to use but I'm leaning heavily toward the BAT Igniter. I'll be necking down ADG 6.5 SAUM brass and once it's done the 134 ELD-M will get tried out first with either N565 or RL26 maybe even N570 but it may be a little to bulky and slow to get enough in the case. Only time will tell.

 

[amassi]

What bullet?

Berger 135


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[B23]

25 prc
Lapua brass
6.5 prc bushing dies with a .283 neck bushing
23” barrel is 3200 fps
VV N565 and fed 210m

Is that 3200 what you're hoping for with 135's or are you actually getting 3200 w/135's?

I'm hoping for 3200 w/134 ELD-M in a 25 SAUM which has more case capacity then the 6.5 PRC case so if you're getting 3200 w/135's in the PRC case I'm optimistic 3200-3200+ should be pretty easily doable in a 25 SAUM.

 

[amassi]

Is that 3200 what you're hoping for with 135's or are you actually getting 3200 w/135's?

I'm hoping for 3200 w/134 ELD-M in a 25 SAUM which has more case capacity then the 6.5 PRC case so if you're getting 3200 w/135's in the PRC case I'm optimistic 3200-3200+ should be pretty easily doable in a 25 SAUM.

That’s actual velocity a grain below pressure. You’ll have no issue exceeding that velocity with the saum case. I stopped at 3200 intentionally to save jackets and it shoots incredibly flat and wind calls at 3200 anyway


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[Harvey_NW]

25 creedmoor PBB 1:7tw 20" tube, Peterson brass, CCI 200, 133 Berger Elite, 39.2gr H4350 - avg 2640fps. Haven't hit 100 rounds yet and finally got the whisper pickle it was built for so after brass is all fired I plan to readjust and see the real velocity potential. 10 shot group.

 

[B23]

shoots incredibly flat and wind calls at 3200 anyway

That is my whole purpose for building a 25 SAUM. You run the numbers on a 134/135 w/.640-.650 BC at 3200 and it's pretty damn impressive. If I can get 3200+ and they'll hold together, oh mamma!

 

[amassi]

That is my whole purpose for building a 25 SAUM. You run the numbers on a 134/135 w/.640-.650 BC at 3200 and it's pretty damn impressive. If I can get 3200+ and they'll hold together, oh mamma!

I’ve never lost a jacket with the 135 but I think it has a thicker jacket than the 133 berg and 134 eld. My rifle has a ti pro and has essentially no recoil either.
Barrel is about ready to get pulled merely to try a new cartridge, still shoots great at 980 rounds


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[B23]

With more interest in heavy for caliber 25 cals maybe Hornady will make something like a 140 A-Tip with a BC around .700

Kinda funny, I've never had much interest in or even liked the quarter bores and now I'm advocating for more 25 cal heavies....

980 rnds sounds pretty good. I don't imagine a 25 SAUM will go that long so I'll just have to hope for the best.

 

[amassi]

With more interest in heavy for caliber 25 cals maybe Hornady will make something like a 140 A-Tip with a BC around .700

Kinda funny, I've never had much interest in or even liked the quarter bores and now I'm advocating for more 25 cal heavies....

980 rnds sounds pretty good. I don't imagine a 25 SAUM will go that long so I'll just have to hope for the best.

If you use N570 you’ll probably closer to 700. My throat is definitely eroding but those 135s have a wide jump tolerance in my experience


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[hereinaz]

25 Sherman Short Tactical

133 bergers with H1000 easy 3100 -3200 with 22 to 26” barrels.

 

[B23]

25 Sherman Short Tactical

133 bergers with H1000 easy 3100 -3200 with 22 to 26” barrels.

Is that the one based off the SAUM but he pushed the shoulder back a bit giving a longer neck but shorter overall case and it has a sharper 35° or 40° shoulder angle?

 

[hereinaz]

Is that the one based off the SAUM but he pushed the shoulder back a bit giving a longer neck but shorter overall case and it has a sharper 35° or 40° shoulder angle?

Yup, it is blown out some, but the SST or Tactical series does not have the sharper shoulder.

The Sherman Short or SS series blows the shoulder angle out to the 40. I have the 7 SS and love it with 180 at an easy cruising 3050 with RL 26.

My 7ss and 25sst pretty well match elevation dope out to 900. The 180 grain bullet has less wind deflection than the 133 of course. But, it isn’t much.

I got the 25 to run a 22 inch barrel and smaller bullet for deer. My 26” 7ss blew up a little coues whitetail at 730 yards.

I run the Bergers, 133 EH and the 180 HVLD

 

[B23]

So a 25sst has the same 30° degree shoulder as a factory RSAUM case but the shoulder is pushed back creating a slightly longer neck length but shorter overall case?

"Yup, it is blown out some, but the SST or Tactical series does not have the sharper shoulder."

I'm confused, how is it blown out if it uses the same 30° shoulder angle as a factory SAUM case??

 

[hereinaz]

So a 25sst has the same 30° degree shoulder as a factory RSAUM case but the shoulder is pushed back creating a slightly longer neck length but shorter overall case?

"Yup, it is blown out some, but the SST or Tactical series does not have the sharper shoulder."

I'm confused, how is it blown out if it uses the same 30° shoulder angle as a factory SAUM case??

Correct, I was not clear. The shoulder is not blown out in the SST to a new angle.

On the SS and the SST, the overall case taper on the walls from the base to the shoulder is blown out. The Sherman cartridges mostly have walls that are more parallel.

That’s how he can push the shoulder back and keep case capacity.

He made the SS style first, then made the SST without the shoulder taper for better feeding and getting good velocity without pushing for maximum velocity.

IMO, on the 6.5 and the .25, you don’t really need the extra case capacity of the SS. The SS bigger size makes a meaningful difference with the heavier 7mm bullets to get them up to speed and to seat them in a short action magazine. Otherwise, the SST fits the shorter bullets in the magazine and can get them over 3100 fps without a long barrel. I think overbore that pushes over 3100 fps is too much. That is just me. I like the sweet spot between 2950 and 3150 to balance efficiency, barrel life, precision, etc.

From his website about the difference:

due to the SS having less body taper (and 40 degree shoulder) than the SAUM, the case capacity of the two are nearly identical even though the overall length of the SS is much shorter in the critical body area, and the neck/shoulder junction, which determines throat length for proper bullet positioning.

 

[Mountainrancher]

Bumping this anybody else running a fast twist 25?

 

[Brandon.miller.4]

Tikka action 25-284
PBB barrel 21"
Berger 133g @ 3020fps
55.5g h1000