Thats SKOOTIN'!!

Looks like fun! I actually believe that the 6.5-300 weatherby is the absolute flattest cartridge.

I fkn love how the "old" wby is whoopin every new catrtidges ass!! WEATHERBY!!

Well that is awesome!

Those are impressive. Velocities for sure. I have been wanting to try those LRX bullets in my 257 STW, to see what it will do

I never reloaded ammo for 257 Weatherby mag. I did have the pleasure of sighting in an old Mark V back in 1984 for a former boss. He pulled me off the job because he knew i was a gun nut . It had a 4x Ziese scope mounted on it. The best clearest glass I ever looked through. Put my 3x9 Leupold to shame . I could easily see the bullt holes on paper at a hundred yards. It had moa accuracy shooting with the factory ammo . The odd thing , the ammo had a 117 gr round nose bullet. Had a tiger on the cardbord ammo box. Did not make sense with such a hot rod like 257 Weatherby mag. The Weatherby rifle was won in a poker game by my boss. It came from a south Texas rancher oil tycoon. I will not mention his name. He was somewhat notorious. Probably dead now. Only wealthy hunters had Weatherby rifles back in my youth. Blue collor folks had Remingtons and Winchesters back then. I miss those days.

❤257WB. I run my weatherby cold.and clean. Then cold and fouled . 2 shot hunting rig. Try development with 2 shot groups. 4 shoots total. The 3 rould in your 3 shot group will always throw you off, hyper magnum foul qiuck changing your P.O.impact. I like to run my rig cold and clean. Zero fornthe first 2 shots. I know the 3 shot will be higher presure then the first2 and i adjust from there.

Great video

With the 135 in the 257 WBY you might try US 869 or the old H 870 if you have some ( it has been discontinued ) also if you have any WC 860 ( surplus 50 BMG powder ) same burn rate as H 870 , use starting load and work up ! Thanks for all your hard work for us !…….

Ohhh I miss my 257 Roy 😢 might just have to get another one 😁

That's a real Lazer beem for sure. I have no idea how you can get that much speed I wonder how the 95gr tipped hammer would compare. I try to limit myself to under 500yrds, and along with flatness I really look at the retained velocity numbers, because some bullets don't open so well at low speed. I love your idea about using staball hd. I picked up a couple pounds of it this summer, as well as some Vihtavuori 570 to try in my 257, 6.5x300, and 300 wbys this winter. I'm warning you now. If you get a 6.5x300, you will become addicted. I've used quite a few calibers and killed quite a bit of game, and that 6.5x300 hits animals harder than anything I've seen. Just this year I've had an antelope and a deer drop in their tracks from poor hits. The antelope was a classic gut shot and it went straight down. It did stand back up, but it wasn't going nowhere. Those swift scirocco bullets might be a factor as well. I bet the 100gr .257 ones would be pretty awesome in the 257wby as well if you can get accuracy. Of the bonded bullets, they seem to have the best bc. Thanks for the great content.

That’s bonkers! That would be an ideal mule deer and antelope rig. I want to play around with the 130 TTSX in my 300 mags and see what they do.

Lightning, at speeds like that with a copper bullet nothing in north America is walking away. 500 and in that thing will hit like thors hammer. I wouldn't worry about the twist rate with that data.

Quite impressed with the ES. Harder to get such low ES as you get higher in velocities too. Think the 28 Nos maybe edges the flatness as that 180 is pretty heavy for caliber. I'd venture to guess that harmonics might be keeping groupings around that MOA mark. When you have the ES #s that would lend well to seeing really tight accuracy.

Awesome little round, definitely hits above its weight. Hey been wondering what type of ballistics you could get with the 375 ruger loading the 250gr cx/gmx Hornady bullets, 260gr Nosler accbound, or even 270gr sp-rn out of a 23in barrel. I’m thinking 2800-2950fps? Feel like it’s a very underrated round especially for shooting out to say 400-500 yards, similar ballistics to a 30-06 firing 165-180 gr bullets? Especially being a standard length action and more efficient then 375h&h. Seen you do some content on it in videos but can’t find much anywhere else, thanks!

Added on.. I'm shooting the nosler e tip 100 gr

Need try the 62gr hammer bullets in it lol 4200fps?

My 257 roy is my absolute favorite. I love 100 grain ttsx. May have to try the 101s. I chronoed the ttsx factory ammo and was getting averaging 3430 fps with a 24 inch barrel. I'm gonna start relaxing for it, hoping to see somewhere close to 3600.

Try H1000. I am running Barnes 100 grainers at an average chronographed velocity at 3663 FPS with no pressure signs and excellent accuracy. I would have liked to have seen it compared to the .26 Nosler. I am running Barnes 120 Grain Barnes chronographed at an average velocity of 3521 FPS with excellent accuracy.

what are you using for powder and how much to get the 3814FPS?

Yep, time of flight matters. I'd take a look at LRT powder for the Berger bullets, if you can find some and haven't already tried it.

how does this weatherby compare to the 257 scramjet?

The wind drift out of your low bc bullet would be, several feet more than several of the other cartridges like 7PRC, which would make the PRC BETTER. Now the RL series of powder would be much better than 7828 for your pressure issues. I am looking forward to your results with the bigger and higher bc bullets.

What powder were u using

How many gains of what powder in this load shooting 3814? And factory or custom? Normal weatherby freebore?

What is your favorite powder with the Barnes bullets?

What is the velocity on the 135s?

😎👍👍👍😎

Why not compare the old 264 Magnum to some current rounds?

Weatherby used to have an 87 gr load at over 3,800 fps mv.

How are you getting 3800 fps I shoot 257 wby mag, rl 25 73 grains with a 24" barrel and I'm getting 3380 fps

Ten shots and the barrel flames out and melts!😂

100 grain TTSX = lights out from 0-500yds with the 257 bee.

The one thing that really stands out. 6.5 CM doesn’t hold anywhere near the powder of the other rounds.

impressive af, at wht pressure do these loads operate at i mighty wonder

A guy on FB posted he was getting 4432 fps using 67 Hammers and H4350.

Barrel life has left the chat

Put an LRX in the 6.5 300 !

Wow, did you go to ~74 grains of Reloader 22?

But it's belted magnum right

My custom 7mm rum with a 28 inch hart barrel does 3350fps with 180 berger hybrid thats flat at 1000yds

No doubt the 257 is a fast flat shooting caliber but flattest? No and I say that as a 257 Weatherby fan. I have a 257 Weatherby and 25/06 AI. The AI will run with the Weatherby on lighter bullets but the Weatherby edges it out a bit. My 25/06 AI will shoot flatter at longer ranges with a 135 grain vld. Would love too see Weatherby offer a 1/7.5 twist or 1/8 to handle heavier bullets with higher vld’s I am not sure why Weatherby has not adopted a faster twist barrel with the heavier vld bullets that have come to the market?

I'll bet you would do better with some Hammer Bullets!!! Good luck and stay safe. 😉😉😉

You have to let those vanguard barrels cool down after the first 2 shots I was having that problem with my 300wby and same thing first 2 touching 3rd down and right. Let it cool after the 2nd shot 3rd one was right in with the other 2

My custom 7mm stw with 175 ablrs does 3210fps that beats 197 also at 1000yds

Smoking

Please ( STOP ) presenting the facts to us , you are recking everything !

Added on.. I'm shooting the nosler e tip 100 gr

How are you getting 3800 fps I shoot 257 wby mag, rl 25 73 grains with a 24" barrel and I'm getting 3380 fps