High BC .257 bullets?

skip AI · #15 10-15-2006, 08:19 PM

Brian, fair enough mate. Nice sounding rig gotta love the sako action, mines got a L691 on her.
I am very interested in your data, please send to:shanepfeiffer@hotmail.com

BTW, have you played with AR2213sc? What result?

cheers

reed mosser · #16 10-15-2006, 08:51 PM

Hey brian i'm thinking of making a 25-243 ackley to shoot the 125 and 130 wildcat ulds. Do you know what the b.c is on those bullets. if you dont want to post it on the board e-mail me at reedmosser@hotmail.com And did you shoot your 22-6mm ackley with the 100 grain rbbt? thanks again reed

Fiftydriver · #17 10-15-2006, 11:53 PM

XP,

1-7 is slightly more then needed for the 142 gr but it is still what I would recommend if you wanted to use both of these bullets. I have used a 1-8 twist and the 156 shot very well at velocities over 2900 fps. In the shorter barrels, a 1-7 would be perfect in my opinion.

Rock barrels will be offering 25 cal 5R barrels here soon. They will be getting the tooling in this winter they tell me so when that happens you would be able to get something like a 1-7.5 which would probably be the best for the 156. A 1-8.5 would be perfect for the 142.

Kirby Allen(50)

Ernie · #18 10-16-2006, 12:05 AM

Kirby,
Thanks! I'm seriously considering a fast twist 25 WSM in my MOA Maximum.
Thanks for the update on the 25 cal barrels.

brianwinzor · #19 10-16-2006, 07:42 AM

SKip AI, Ok will send the data on rifle 2 which is the custom 25/06AI that I mentioned. However, I will split it into several files as it is a large file and would take forever to download if you are not on broadband.

AR 2213sc (H4831sc in US) hit the pressure limit at about 3,479 fps with the 100 grain bullet, which is at least 75 fps slower than many others with a similar burning rate.

I didn't try AR2213sc with the 115 grain bullet as I prefer to use powders that will give me a load density in the 95 - 100% range.

The powders I tested with the 115 grain bullet were IMR7828, Viht N165, VihtN170, Re 25, H1000, and H870.

Yes! I am getting form as a being a Sako and Rem 700 slut. My first centrefire was a Sako L461 Sporter in 222Rem in 1967. Since then I have had Sako rifles using L579, L61R, and AV actions. Regards, Brian.

jro45 · #20 10-16-2006, 08:03 AM

I have found that Hornadys 87gr bullet has a very high BC.
When shooting the 100 gr, 117 gr, and the 87 gr bullets to 200 yds they all grouped into a 1.9" group.

brianwinzor · #21 10-16-2006, 08:07 AM

Reed, No! I don't know what the BC of the 125 and 130 grain ULD's is. I don't have any 130 ULD's, although I do have some 130 BCFBHP's.

However, I hope to do a drop test out to at least 800 yards with the 125 and 156 grain bullets in my 257W in the coming months. I will email you the results once it has happened.

Have you estimated what velocities you might get with the 25/243AI with the 125 and 130 grain bullets?

I feel embarrassed to report that I still haven't tried the 100 grain Wildcats in a .224 Clark, and it now looks as though it will be another 2 months. The Krieger 6.5 twist barrel has been sitting in the cupboard since February. I ordered a Boyd's Boys JRS laminated stock in March, and was told it would take 3 weeks. It still hasn't arrived, but have been told for the 27th time that it is on the way!!!! I purchased a Rem 700 SPS in 270W in July, which I will use as the action for the .224 Clark. I already have dies and formed cases from the previous rifle, and plenty of new brass which I will form once the rifle has been chambered.

Several days ago, I decided I might as well load some ammo for that .270 rifle, and use it until the stock arrives, and my gunsmith is ready to go.

It will be interesting to see if the Krieger 6.5 twist barrel is any better than the others in keeping the Wildcats in one piece at over 3,100 fps. However, If I have to use them at around 3,100 then I won't be slashing my wrists. Regards, Brian.