25 prc? 25-7 prc? Experiences? Gotchas? Intangibles?

[Ucsdryder]

Nice, just ordered 138 Atips for mine. Let’s seen how they shoot.

Please post results!

 

[cal30_sniper]

25/300 WSM dies are available, and PBB has a chamber reamer for it. Good ADG 270 WSM brass makes an easy neck down. Essentially the same case capacity as a 7PRC but fits in an extended box short magazine which the 25-7PRC is just a smidge too long for with the 133-135gr bullets seated all the way out.

I’m putting one together on a Defiance AnTi-X short action with the Unknown Munitions mag cut for a 3.150” box.

6mm CM in the photo for comparison, these are the dummies I sent in to have the barrel throated properly.

 

[T_Widdy]

25/300 WSM dies are available, and PBB has a chamber reamer for it. Good ADG 270 WSM brass makes an easy neck down. Essentially the same case capacity as a 7PRC but fits in an extended box short magazine which the 25-7PRC is just a smidge too long for with the 133-135gr bullets seated all the way out.

I’m putting one together on a Defiance AnTi-X short action with the Unknown Munitions mag cut for a 3.150” box.

6mm CM in the photo for comparison, these are the dummies I sent in to have the barrel throated properly.

what case are they headspacing it off of?

 

[cal30_sniper]

what case are they headspacing it off of?

It uses the 300 WSM headspace (which is the same as the 270 and 325 WSM). Only the 7mm got the longer headspace, presumably to help prevent big whoopsies from 7mm bullets entering 270 barrels.

 

[T_Widdy]

It uses the 300 WSM headspace (which is the same as the 270 and 325 WSM). Only the 7mm got the longer headspace, presumably to help prevent big whoopsies from 7mm bullets entering 270 barrels.

Edit***** Hornady looks to have the wrong measurement. I should have looked at the saami prints as they are the same like you said.

I thought the 270 wsm has a .010 longer base to shoulder dimension to keep it from going into a 300 wsm chamber. Am I looking at these prints wrong?

 

[cal30_sniper]

Weird, Hornady seems to be consistently wrong in that measurement. Both my #10 and #11 Hornady print manuals carry the same incorrect 1.654 measurement for the base to shoulder dimension on the 300 WSM. SAAMI, as well as my paper copies of the Berger and Sierra loading manuals all list the same 1.664 measurement for the 270, 300, and 325 WSM.

The story I always heard was they bumped the 7mm WSM shoulder forward to keep it from mischambering in a 270. I never saw any accompanying explanation about what that set the poor sod up for that put a 300 in a 7mm though.

It's a shame they did the 7mm WSM headspace different from the others. Ballistically, it's the best of all factory options, but now you can't get good brass without fireforming the different shoulder for it.

 

[T_Widdy]

Weird, Hornady seems to be consistently wrong in that measurement. Both my #10 and #11 Hornady print manuals carry the same incorrect 1.654 measurement for the base to shoulder dimension on the 300 WSM. SAAMI, as well as my paper copies of the Berger and Sierra loading manuals all list the same 1.664 measurement for the 270, 300, and 325 WSM.

The story I always heard was they bumped the 7mm WSM shoulder forward to keep it from mischambering in a 270. I never saw any accompanying explanation about what that set the poor sod up for that put a 300 in a 7mm though.

It's a shame they did the 7mm WSM headspace different from the others. Ballistically, it's the best of all factory options, but now you can't get good brass without fireforming the different shoulder for it.

Do you have the barrel yet? Let us know the specs when you get it done. When my 25-7 is burned out I’ll be building a 25wsm

 

[cal30_sniper]

Do you have the barrel yet? Let us know the specs when you get it done. When my 25-7 is burned out I’ll be building a 25wsm

Not yet. I'll probably have it in hand early summer based on their lead times. I can definitely post some chrono'd load results as I start into ladders. I've got both N570 and Retumbo that should be good matches based on the GRT data that I've run, which puts either of them right at 3000fps with a 134gr ELDM from a 20" barrel within SAAMI pressure limits.

 

[surfr716]

ive got a 25x7 prc barrel being spun up right now at prefered, just waiting on an email saying it's shipped. my theory was 257 Weatherby ballistics without dealing with a case belt or oddball shoulder. Once it gets in i'll be threading it onto an aero solus lightweight action. Really looking forward to seeing what it can do. Picked up a bushing die, and a 25 wssm for seating, same case neck and body dimensions so it should work well enough. gonna try the berger and hornady offerings to start.

 

[sportsmans challenge]

ive got a 25x7 prc barrel being spun up right now at prefered, just waiting on an email saying it's shipped. my theory was 257 Weatherby ballistics without dealing with a case belt or oddball shoulder. Once it gets in i'll be threading it onto an aero solus lightweight action. Really looking forward to seeing what it can do. Picked up a bushing die, and a 25 wssm for seating, same case neck and body dimensions so it should work well enough. gonna try the berger and hornady offerings to start.

What length barrel?

 

[schmidty3]

Decisions have finally been made and locked in.

Ordered a pbb prefit.

25 prc

23.25" (just to be different and to try to hit 3100-3200 fps)

Hybrid lite with the helical fluting.

Yet to be purchased...

SAC die. I like how the bushing has the shoulder geometry built in, should make sizing a snap.

Probably 200-300 pieces of adg brass.

Still debating powders. N565 or h1000 seem popular. N570 seems less popular but faster.

Tempted to just start with eldms as they are cheaper.

Also need to discuss stock options! My stockys has a factory contour that doesnt have enough clearance. Probably flip that. And am really debating a folding hnt26.

Also will flip my Murphy rail. Get the um rings. And start watching for a trijicon ten mile sale or a rs1.2

 

[khuber84]

The short 2.020 prc case is nothing special. It's the smallest of pretty much all the magnums case head rounds. 68gr capacity, that's going to have the same performance of a 25-06. This is not magnum performance.

If you want speed with heavies, I'd def suggest a 7prc parent with 200 thou freebore, or a 257 wby with about the 170 thou freebore as it has the very long neck. Other great parent cases the 7mm blaser, which the prc pretty much copied minus rebated rim. The 7lrm, which holds just a bit more than a weatherby.

I'm not a fan of the belted cases, so it'd likely be the 7prc parent for me. I have a 257 blackbird(25*7blaser) it's a long barrel, but 3400 was pretty easily attained with 131s using 8133 and Retumbo. N570 was up to 3500fps. The norma brass is soft tho, clickers happen quickly. Wish ADG would make that stuff. Smallest cases I'd run, Saum or 6.8 western parent. I do have a 23in 25prc, using H1000 pressure is around 3150, not great, it shoots well at 3080. Basically the same speed nodes as a 65prc with 140gr bullets. Recoil is very similar, I'd personally stay 6.5 for the better bullet selection.
Stepping to a 6prc, things get interesting 3100-3200 is doable with the heaviest bullets with normal non double based magnum powders. My experience from a 20in 6prc.

Everyone loves the 65prc case, but it doesn't do much for me, as the 65x284 and 65 rem mag already did it, same case capacity. For it to really shine it has to be necked to 6mm.

 

[schmidty3]

The short 2.020 prc case is nothing special. It's the smallest of pretty much all the magnums case head rounds. 68gr capacity, that's going to have the same performance of a 25-06. This is not magnum performance.

If you want speed with heavies, I'd def suggest a 7prc parent with 200 thou freebore, or a 257 wby with about the 170 thou freebore as it has the very long neck. Other great parent cases the 7mm blaser, which the prc pretty much copied minus rebated rim. The 7lrm, which holds just a bit more than a weatherby.

I'm not a fan of the belted cases, so it'd likely be the 7prc parent for me. I have a 257 blackbird(25*7blaser) it's a long barrel, but 3400 was pretty easily attained with 131s using 8133 and Retumbo. N570 was up to 3500fps. The norma brass is soft tho, clickers happen quickly. Wish ADG would make that stuff. Smallest cases I'd run, Saum or 6.8 western parent. I do have a 23in 25prc, using H1000 pressure is around 3150, not great, it shoots well at 3080. Basically the same speed nodes as a 65prc with 140gr bullets. Recoil is very similar, I'd personally stay 6.5 for the better bullet selection.
Stepping to a 6prc, things get interesting 3100-3200 is doable with the heaviest bullets with normal non double based magnum powders. My experience from a 20in 6prc.

Everyone loves the 65prc case, but it doesn't do much for me, as the 65x284 and 65 rem mag already did it, same case capacity. For it to really shine it has to be necked to 6mm.

It may be the smallest magnum on your list... but it will do what I need it to. Maybe that makes it the efficient choice? I also like the infrastructure behind the prc cases. And I'd like to use it in a NRL match. 3250 fps speed limit. I was between a 25-7 prc with a 20" and a 25 prc with a 23-24". 3100-3200 is 3100-3200 last I checked. I went with the 25 prc to be more gentle on things and get some more barrel life.

It'll beat what my current 300 mag load will do with less recoil. That was the goal.

And I don't really get the argument for bullet availability. There's a few bergers and there's an eldm. That's what everyone is shooting anyway in everything else right? And I happen to really like that bullet weight and those bc's.

And I want to try a 25. Cuz 'murica.

And I may just make my 6.5 creed a 25 creed someday.

 

[hdc77]

It may be the smallest magnum on your list... but it will do what I need it to. Maybe that makes it the efficient choice? I also like the infrastructure behind the prc cases. And I'd like to use it in a NRL match. 3250 fps speed limit. I was between a 25-7 prc with a 20" and a 25 prc with a 23-24". 3100-3200 is 3100-3200 last I checked. I went with the 25 prc to be more gentle on things and get some more barrel life.

It'll beat what my current 300 mag load will do with less recoil. That was the goal.

And I don't really get the argument for bullet availability. There's a few bergers and there's an eldm. That's what everyone is shooting anyway in everything else right? And I happen to really like that bullet weight and those bc's.

And I want to try a 25. Cuz 'murica.

And I may just make my 6.5 creed a 25 creed someday.

You’ll love it, I regret selling mine. I am shooting a 25 SST with 134 eldms, no recoil , 3100 fps and tight groups.

 

[khuber84]

It may be the smallest magnum on your list... but it will do what I need it to. Maybe that makes it the efficient choice? I also like the infrastructure behind the prc cases. And I'd like to use it in a NRL match. 3250 fps speed limit. I was between a 25-7 prc with a 20" and a 25 prc with a 23-24". 3100-3200 is 3100-3200 last I checked. I went with the 25 prc to be more gentle on things and get some more barrel life.

It'll beat what my current 300 mag load will do with less recoil. That was the goal.

And I don't really get the argument for bullet availability. There's a few bergers and there's an eldm. That's what everyone is shooting anyway in everything else right? And I happen to really like that bullet weight and those bc's.

And I want to try a 25. Cuz 'murica.

And I may just make my 6.5 creed a 25 creed someday.

It's your gun, do as you wish. My point was, if you want short barrel performance, get a big parent case so you're not running 70k plus psi to get your desired goal. I'd just get a 25 creed if you want barrel life. It'll likely last 2x longer than the prc.