.25 cal 131g .330G7 bullet from Blackjack Bullets for you to drool on ...

[yorke-1]

Sometimes you have go backwards in order to go forward.

.257 Banshee

Yes sir, that's the ticket!

That's funny, I drew up a print based on the 6.5x68 case necked down to 257 a while back. I showed it to a buddy of mine who pointed me towards the 257 Banshee which turned out to be nearly identical.

Somebody could go the other direction and do Gary Reeder's 255 Banshee. LOL

 

[257 Blackjack]

A friend will have his 25-300 WSM up and running soon. A good BC running 3350-3400 fps isn't anything to sniff at. Really what else can you obtain without a lot more trouble?

The 257 WBYs are getting 3300-3400 fps from emails and some reports on this site.

I like seeing all the crazy wildcats but for my available time and lifestyle good brass availability and easy neck-up/neck-down operations are the ticket for me. Even a 257-280 AI would be a sweet round without too much penalty in barrel life, recoil, etc.

 

[sable tireur]

Originally designed by Dr. Ramon Somovia, produced by Norma and rifles built by Fred Wells, Wells Sport Store c.1958/59.

.257 Condor from Original Norma cases or made from 7x61 S&H Super

1. Norma 7x61 Sharpe and Hart on the left; Norma .257 Condor on the right.
   
   
2. Bullet profile of projectile seated in the Norma .275 Condor.
   
   
3. Bullet tip of the .257 Condor showing the hollow point.
   
   
4. Norma headstamps for the 7 x 61 Sharpe and Hart and the .257 Condor.

5. Cases are available through Huntington's, I just bought some.

.257 Banshee

.257 Banshee is simply the 6.5x68 case necked down to accept the .25 caliber bullets. It has to be fireformed but hunting and target shooting can be accomplished while doing this. Cases are available though Huntington's. I know, I just bought a bunch.

 

[257 Blackjack]

Originally designed by Dr. Ramon Somovia, produced by Norma and rifles built by Fred Wells, Wells Sport Store c.1958/59.

.257 Condor from Original Norma cases or made from 7x61 S&H Super

1. Norma 7x61 Sharpe and Hart on the left; Norma .257 Condor on the right.
   
   
2. Bullet profile of projectile seated in the Norma .275 Condor.
   
   
3. Bullet tip of the .257 Condor showing the hollow point.
   
   
4. Norma headstamps for the 7 x 61 Sharpe and Hart and the .257 Condor.

5. Cases are available through Huntington's, I just bought some.

.257 Banshee

.257 Banshee is simply the 6.5x68 case necked down to accept the .25 caliber bullets. It has to be fireformed but hunting and target shooting can be accomplished while doing this. Cases are available though Huntington's. I know, I just bought a bunch.

The 257 Condor is an article I read every now and again. The guy was on to a lot of things before their time but a few wrong turns and the project got covered in dust. Very neat to look back at the development of these cartridges. : )

 

[Swamplord]

257 Wby ? Never heard of her ....

 

[Sgibb]

I see no reason to work with small capacity cases when shooting heavy for caliber bullets unless you want to test subsonic loads. These bullets should be designed to deliver all the gusto we can gather from one case.

.257 Weatherby (bore rider freebore)
131 Blackjack
28" barrel, 5R, hand lapped
7.25" twist rate
Two different days (actually PM one day, AM the next)
Just about 400 feet above sea level
89 degrees PM, 45% humidity
81 degrees AM, 68% humidity

First accuracy load PM = ~3280 fps/ 7 ES
First accuracy load AM = ~3320 fps/ 11 ES (different powder)

RPM is around 325,000 approximately. (Bullet RPM = MV X 720/Twist Rate in inches)

All bullets found their way to the target in one piece leaving perfectly round little holes.

Next is to step these out to 600 yards and see what takes place. Then down to the 1,000 yard range for a day of fun with steel and paper. This may have to wait for the work load to diminish slightly...

I just had my .257 Weatherby rebarreled with a 1:8, standard reamer, can you tell me what your COAL is, can you still run them in a standard Mark V mag?

 

[sable tireur]

Here is the SAAMI specifications drawings for the cartridge and chamber:

Note that your overall length will vary according to shape of the bullets selected to shoot. The range as stated above is from 3.049" to 3.209", but reamers have been known to vary even though the gunsmith tells you it is a "standard" reamer. You should get him to tell you what the chamber dimensions are.

You should also have a top of the line reloading manual which will have these dimensions listed also.

Regards.

 

[257 Blackjack]

I just had my .257 Weatherby rebarreled with a 1:8, standard reamer, can you tell me what your COAL is, can you still run them in a standard Mark V mag?

As Sable mentioned, Standard may be 0.150" or 0.300+". Likely it is a generous freebore setup.

What is the length limitation on a WBY MK V?

 

[Barrelnut]

Hunting bullets for next year?

 

[CA48]

A look at some S/A cartridges with the 131gr ACE seated at 2.880" .

Left to Right.
25x47
25 Creedmoor
25/243 Win
25/243 WSSM
25 SST (not formed)
25 SS
25 SAUM
25 WSM

 

[MudRunner2005]

That .25 SS looks badass.

 

[sable tireur]

CA48,

Good job on the photograph showing the comparison between cases. Takes all the guess work out of it!

Thanks!

 

[adam32]

That .25 SS looks badass.

Looks just like the 25 saum just a tad smaller and more work to make it lol

 

[CA48]

CA48,

Good job on the photograph showing the comparison between cases. Takes all the guess work out of it!

Thanks!

Thank you.