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  #1  
Old 01-06-2013, 06:15 PM
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25/08 Caliber Anyone!


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Well it seems as though I have found a lonesome model 70 Wincheter in the vault, marked .243 cal. I been thinking a lot lately, bad habit when it comes to work. I also have a new take off barrel from a 25/06 model 70 and was going to stick it on the .243. Anyone ever tried this combo down the road? I am positive it will have plenty of zip down range and handle the same varmints/predators with the same alope as the Quiarter bore did prior.
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  #2  
Old 01-06-2013, 06:43 PM
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I'm sorry to say this idea never crossed my mind... but I wish it had. I'd like to hear more about this project. It sounds promising.
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  #3  
Old 01-06-2013, 07:21 PM
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It was done in the late '60s, called the 25 Souper! Just a necked down 308 with the same shooulder angle. It has almost the exact capacity as the 257 Roberts. But unlike the robers the case is shorter overal by .25 inches and might fit a SA better than the roberts or the roberts improved (more powder capacity.

Most 25 caliber are considered dual purpose varmint/deer rifles. The 260 rem is the 308 necked to 6.5mm.

Google 25 Souper, I suspect you will find loads, etc. and a lot of Souper lovers.
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  #4  
Old 01-06-2013, 07:46 PM
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Was there a typo in the thread title? You say .25-08 then mention a .25-06 barrel. Unless you're planning to cut a chunk of the chamber end of the barrel and rechamber it to .25 Souper, that is.
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  #5  
Old 01-06-2013, 09:16 PM
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Would a 25/08 be some kind of an 8mm case necked down to .25-caliber? Talk about the heat and flame chewin' up that throat! Or maybe not. Somebody please school me as the to exact meaning of "08." I know what a 7mm-08 is. Would this 25/08 round be similar?
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  #6  
Old 01-07-2013, 02:14 AM
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Yes, 308 necked to .25 cal.
It was first done in the 1950's.
Rocky Raab has one.
Maroontoad had one.
There are several on the .25 Caliber board - QuarterBore.
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  #7  
Old 01-07-2013, 03:21 AM
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Quote:
Originally Posted by nvshooter View Post
Would a 25/08 be some kind of an 8mm case necked down to .25-caliber? Talk about the heat and flame chewin' up that throat! Or maybe not. Somebody please school me as the to exact meaning of "08." I know what a 7mm-08 is. Would this 25/08 round be similar?
Ironically, there is another thread going on the 25 STW, which IS the 8mm Rem Mag necked down to quarter-bore! And yeah, that is one throat no amount of lozenges is going to cool down!

In this case, it's the 25 Souper, or 308 necked down to 25. A lot of guys have wondered: There is a 243, 260, 7-08, 338 Federal and 358 Winchester...why no 25/08 or 27/08? Good question, but like pretty much everything in wildcatting; it's all been done!
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Old 01-07-2013, 05:19 AM
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I'm with Kludge - a take off barrel in 25-06 is going to have a 25-06 chamber, unless I'm missing something.
You will have to cut off part of the rear of the take off barrel, rethread, and rechamber the barrel to make a 25 Souper (25/308). Certainly possible, but a bit more involved, and expensive, than simply taking off the 243 barrel and screwing on the 25-06 take off barrel.
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  #9  
Old 01-07-2013, 08:20 AM
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Just have your current 243 barrel rebored to 260 Remington and save yourself a lot of headache. Factory ammo and dies, plus a larger selection of bullets makes the Remington the better choice.
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  #10  
Old 01-07-2013, 12:08 PM
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Speakin' of "all been done..."

Quote:
Originally Posted by broom_jm View Post
Good question. But like pretty much everything in wildcatting, it's all been done!
Speaking of "all been done," everything the gunsmith needs to build the .358 Sierra Stomper has been ordered and been sent to his super-secret, Nevada desert bunker. Reloading dies and third forming die will be sent here, as I think will, too, the reamer. I guess so: I have the headspace gauges, so I'm guessing the reamer will come to my home before it gets sent to the gunsmith. Other than that, everything needed to assemble is there save the barrel (in fabrication; due to be spit out of Lilja's Montana facility on Feb 22). Expecting to make the 300-mile, round-trip to Winnemucca in the first 10-14 days of March 2013. Can't wait to pop off that first round...
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  #11  
Old 01-07-2013, 12:24 PM
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Quote:
Originally Posted by Jack View Post
I'm with Kludge - a take off barrel in 25-06 is going to have a 25-06 chamber, unless I'm missing something.
You will have to cut off part of the rear of the take off barrel, rethread, and rechamber the barrel to make a 25 Souper (25/308). Certainly possible, but a bit more involved, and expensive, than simply taking off the 243 barrel and screwing on the 25-06 take off barrel.
I thought maybe I read something wrong, but this is what I was thinking also !
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  #12  
Old 01-23-2013, 02:01 PM
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I went with 25-284 instead of 25-08 because the case capacity, 25-284 is equal to 25-06 and load data for 25-06 can be used for 25-284 . Built on a Ruger 308 77v tang safety model. It will shoot 1/4" groups all day. Barrel by Bullberry Barrel Works.
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  #13  
Old 01-23-2013, 03:07 PM
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Yep, a .257 Roberts
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Old 01-23-2013, 05:42 PM
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25-08 / 25-06

Have a gunsmith make a chamber insert to convert the 25-06 to 25-08 or preferably, the .257 Roberts. I have seen M1 Garands chambered in 30-06 that shoot the .308 Winchester. You will have a very long throat but if it won't shoot, then cut the barrel back at the chamber end.
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  #15  
Old 01-24-2013, 05:38 AM
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In your case, I think I'd go with the .260 idea as suggested above and save the .25-06 barrel for a .25-06. If I wanted a short action .25, I'd get/make a .250 Savage. It is one of the most efficient calibers there is.
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