257 Weatherby

It is a spectacular Caliber. I get why it was Roys alleged favorite

Mine is just so easy to shoot accurately and holding on hair to 350 let's you think about other important aspects of hunting than your rifle

I had a 24" vanguard and ran 117gr Interlocks at 3320 with 72.5gr of 7977, 3570 with 100 Etips, 77 gr., wby brass, cc 250s. Was safe in my rifle, hadnt seen any data at all on that powder at that time.
I'd try for more speed, if you dont get what you want you still have a backup load.

My current dream is a 257 WBY. shooting 131 gr. Blackjack bullets at around 3200 FPS.

newmexkid said:

My current dream is a 257 WBY. shooting 131 gr. Blackjack bullets at around 3200 FPS.

Click to expand...

put a 28 in fast twist barrel on it, deer tazer!

25WSM said:

I've been shooting my 257wbymags for 30 years and have had great results shooting 110 Bibbs.

Click to expand...

What's a "Bibb"?

Bibullets.com
Randy Robinett

I suppose it's only bib.
The 110 is the most accurate and highest bc 257 bullet I have shot in a 10 twist. I know the blackjacks have a higher bc but unless you have a custom barrel with a fast twist you can't use them.
Shep

I had a 250 savage AI getting 32-3300 with a 100 grainer. I get around 3700 shooting 100 grain Sierras out of my 257 whby using 7828. Years before that we shot 4831 but jumped on the 7828 wagon giving more Vel. Higher vel. is why the whby is out there, take advantage of what you have to work with.

newmexkid said:

My current dream is a 257 WBY. shooting 131 gr. Blackjack bullets at around 3200 FPS.

Click to expand...

3200 with the 131 Blackjack is a mild pressure load. You can easily get 3300-3400 out of a 26+" barrel and RL 26, 7828, 7977 or 8133. Mine is coasting along nicely at 3325 w/8133.
-----
If you're not pushing a 100gr bullet faster than 3500 why are you paying for expensive wby brass?

del2les said:

Why own a dragster and then run 85 octane?

Click to expand...

True that.

Kgkimerer said:

True that.

Click to expand...

More btu's in a gallon of 85 octane than higher!

Oldschool280 said:

More btu's in a gallon of 85 octane than higher!

Click to expand...

Just sayin, i have a .257 bee and crew for a car that runs 3.80's in the 1/8th

Oldschool280 said:

More btu's in a gallon of 85 octane than higher!

Click to expand...

It not about BTU's. There are a lot of BTU's in a log of oak, but it burns too slowly.

Lower octane burns faster

Oldschool280 said:

Lower octane burns faster

Click to expand...

I understood the analogy just being difficult today.