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OP
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Anyone have any experience with a 257caliber based off of a 308 case? I have heard of a 25 Souper??? or something along those lines. I have a 22-250 AI that is due a barrel replacement and would like to try something a little different. How would it compare to a 260 AI? Thanks for any info.
CK
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Joined: Nov 2007
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Campfire Ranger
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Campfire Ranger
Joined: Nov 2007
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Campfire Tracker
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OP
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Got one, bought a 84M earlier this month from 257heaven. Shot it today and it was way better than advertised.
CK
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Joined: Jan 2012
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Campfire Tracker
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i have more experience than 1 person should. i developed my own version. 30 deg shoulder. called 257 Ely. i built 2 for myself i light sporter and 1 heavy. have also done a few for custumers. matter of fact i am finishing one up today.. so what do you want to know?
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Joined: Jan 2007
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Campfire Tracker
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OP
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What kind of velocity can I expect with a 100gr TSX/TTSX. Any feed issues (700 action). Are you necking 243 brass up or 260 brass down?
Thanks a bunch
CK
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Joined: Jan 2012
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Campfire Tracker
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i did build the sporter on a 700. one of the reasons for the 30 deg shoulder was for feeding. i had heard, at the time, about ackleys not feeding so good. mine feeds butter smoth. cant tell the dif if it was a 243.. i use 7mm08 brass mostly but did some 243 and they worked ok also. you see when i did this 260 wasnt out yet. with 100 gr bullets and lighter i was getting the same vol as my buddys 25-06. i havnt located my load data book yet. but when i do ill give you some real data from all my testing..
the main reason i built this was because i was so impresed with the performance of 257 roberts on the big Neb whittails. thought i wanted a short action light weight with the same effect. and it has been a great sucess. my main deer load is with hor 117. my coyote load is 100 nosler. best thing about it is its the perfict powder cap for 25 bore. its the most accurate and forgiving cal i have.. every one i have built have been deadly accurate.
Last edited by rainierrifleco; 12/30/12.
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Campfire 'Bwana
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Campfire 'Bwana
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in a factory 260 Barrel, ( 22 inches, Ruger action) I run 100 grain bullets at 3350 fps... compare that to factory 25/06 fodder...24 inch barrel on another rifle, and it will add 50 fps... in a 26 inch barrel it adds another 50 fps, for an MV of 3450 fps...
I have 6 chamberings in 260, with barrels from 22 inch to 26 inch..all but one have a one in 8 twist...
"Minus the killings, Washington has one of the lowest crime rates in the Country" Marion Barry, Mayor of Wash DC
“Owning guns is not a right. If it were a right, it would be in the Constitution.” ~Alexandria Ocasio Cortez
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Campfire Outfitter
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Anyone have any experience with a 257caliber based off of a 308 case? I have heard of a 25 Souper??? or something along those lines. I have a 22-250 AI that is due a barrel replacement and would like to try something a little different. How would it compare to a 260 AI? Thanks for any info.
A 25-08 Improved is going to have really similar case capacity to a 257 Roberts. Why bother with the extra expense?
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Joined: Aug 2002
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Campfire Ranger
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Campfire Ranger
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Just a quick look but some of the OAL's were a little long for a Remington SA mag box. This was for handloads and I don't know where factory ammo comes in. miles
Look out for number 1, don't step in number 2.
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Campfire Tracker
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.25 caliber bullets compared to 6.5 bullets....really not even close.
Go with a .260. Just My opinion.
Luck....is the residue of design... ![[Linked Image]](http://i423.photobucket.com/albums/pp311/patrickgsinclair/96zvyt.gif)
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I've always wanted to do a .25-08 AI, but given the available bullets, the .260 or .260 AI is a more practical choice. Go .260 AI. You can still smoke 100s out of it if you want to...
John
If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then I will hear from heaven, and I will forgive their sin and will heal their land. 2 Chronicles 7:14
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![[Linked Image]](http://i1163.photobucket.com/albums/q543/rainierrifleco/257%20Ely/IMG_0252_zpsddf9b557.jpg) just shot the one i put togather. this is not a worked up load rather the load for my heavy gun. (v-Max)1st 5 shots out of new barrel. setteled into 1 hale after 2nd shot. ![[Linked Image]](http://i1163.photobucket.com/albums/q543/rainierrifleco/257%20Ely/IMG_0253_zps2afb63f2.jpg) this is the light sporter with 100 gr nosler bt ![[Linked Image]](http://i1163.photobucket.com/albums/q543/rainierrifleco/257%20Ely/IMG_0257_zps7f73bdd5.jpg) this is the rifle that shot the top target. a 700 24 in 3 gr benchmark hs prec stock
Last edited by rainierrifleco; 12/30/12.
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Campfire Tracker
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i found my book....
the sporter rifle:
hor 75 hp 45.5 4064 adv 3724 this load was too hot for the heavy gun
speer 120 grand slam lc case 2950 fps best group was 2 in kind of gave up on these bullets.
hor 87 43.5 gr 4064 3498 44 gr 3550 noted as hot.
hor 117 45 gr rl 19 2880 verry accurate load. (my deer load)
nos 100 46.5 rl 19 3150 (1 hole)
serria 115 47.5 3100 fps
have more if you need......
Last edited by rainierrifleco; 12/30/12.
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There are so many good high BC bullets for the 6.5 that I would stick with the 260 or even 243 for that matter... Unfortunately, bullet companies have left the .257 behind for the most part.
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Campfire Regular
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i did build the sporter on a 700. one of the reasons for the 30 deg shoulder was for feeding. i had heard, at the time, about ackleys not feeding so good. mine feeds butter smoth. cant tell the dif if it was a 243.. i use 7mm08 brass mostly but did some 243 and they worked ok also. you see when i did this 260 wasnt out yet. with 100 gr bullets and lighter i was getting the same vol as my buddys 25-06. i havnt located my load data book yet. but when i do ill give you some real data from all my testing..
the main reason i built this was because i was so impresed with the performance of 257 roberts on the big Neb whittails. thought i wanted a short action light weight with the same effect. and it has been a great sucess. my main deer load is with hor 117. my coyote load is 100 nosler. best thing about it is its the perfict powder cap for 25 bore. its the most accurate and forgiving cal i have.. every one i have built have been deadly accurate. There are a couple of wildcats based off the 243, but with the front end of the 6xc. One each, I believe in 6mm and 6.5mm. YOu can read up on them by doing a google of 6mmslr and 6.5mmslr. Formed by running the brass of your choice through a FL die. I'd be surprised if no one has done a .257 version..... Kaiser Norton
The Kaiser- "If it ain't broke, I can fix that!"
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Campfire Outfitter
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all things concidered we dont need any of it. all we need is a good old 30-06 it has killed every critter on the planet.. but thats not the point in a wildcat. i thought about a 6.5-08 before the 25 but the 260 wasnt out yet and bullets were scarce. and also didnt meet the criteria i was trying to acheave. a short action 257. i wanted a true dual purpose cartrage. the reason the factories skiped the 25 was the popularity of the 243 and 25-06. 257 rob right in between. its covered. for that matter there isnt much need for the 260 with the 7-08 beeing so fine a carteradge.
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Luck....is the residue of design...
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Evidently over the need for spelling and punctuation.....let alone "carteradges".
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Campfire Outfitter
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I'd likely take a .260/7mm-08 over all previously mentioned 25's, and only because I own one. Living in the West where it can indeed get a little windy at times, I've come to appreciate the hunting bullets with a nice BC. The 115 Berger seems to do decently, though.
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