Is this 300 WBY leade beyond hope?

[Bob Wright]

I'm pretty sure I have some brand new primed 300wby Hornady brass left from my last order. Probably 50 or more. If you are interested, I'll count it up.

My Vanguard wilderness got a Carbon Six prefit in 300prc.

Yes, let me know how many you have and price. Primer pockets are gone on his and we're unable to reload.

 

[spladi]

At 12 o'clock looking into breech
At 3 o'clock
At 6 o'clock
At 9 o'clock
In order of photos.

I had a hard stop on scope and measured up to .15 of missing/eroded lands at 9 and 12 o'clock area.

I had a rifle with a bore that looked this way and it shot Okay to great when super clean but fouled up quickly and the accuracy went to pot, it was a .223WSSM.

 

[R100RS]

try flat based bullets, I get better groups with flat based like Partitions or H165 sp than with boat tails

 

[Idaho Lefty]

A friend's rifle I'm helping him reload for. It's a Weatherby Vanguard, 300 WBY mag. Gun is shooting very bad, velocities were 80 ES. 2 days of Wipeout cleaning got 90% of the copper and carbon ring. Have not shot it after all the cleaning and photos.
These pictures acquired from a Teslong bore scope in the leade area.
One picture shows the leade erosion. Part of the other leade rifling is barely visible/gone. The other shows cleaner leaching out of the fire cracking which gives some indication of depth of cracks.
So,
-continue searching for a load?
-is this chamber toast?
-is it salvageable by re-chamber?
-rebarrel?
I certainly have concerns it is shot out....

 

[Idaho Lefty]

Bob,.. Re-read, your LAST, Line,..
MORE than, likely, it's,.. shot, OUT, Toasted !
As a Former Gunsmith, I've noticed that, most, Weatherby Barrels, ( in the Fast Calibers) last, only,.. 850 to 1,100 Rounds !
My Personal .270 WBY Mag. Mk V German went, out at, 850-900 rds then, One Day, the group's,.. Doubled, in size !
Made it into, a LOVELY .338 Win Mag, 25 1/2 " bbl'd.,.. Elk Slayer !
"Clover Leafing" the 210 Nosler's at, 2,975 FPS with, a Douglas Premium, Barrel !
I save, the End Flap's of my Bullet Boxes now, to remember,.. "Round Counts" !
"Junk IT" and pick another,.. "Good Caliber" and Barrel !
ONLY, Your "Friend's" will tell You the,.. TRUTH

 

[RidgeTop]

A friend's rifle I'm helping him reload for. It's a Weatherby Vanguard, 300 WBY mag. Gun is shooting very bad, velocities were 80 ES. 2 days of Wipeout cleaning got 90% of the copper and carbon ring. Have not shot it after all the cleaning and photos.
These pictures acquired from a Teslong bore scope in the leade area.
One picture shows the leade erosion. Part of the other leade rifling is barely visible/gone. The other shows cleaner leaching out of the fire cracking which gives some indication of depth of cracks.
So,
-continue searching for a load?
-is this chamber toast?
-is it salvageable by re-chamber?
-rebarrel?
I certainly have concerns it is shot out....

This is my Mk V and the end of free bore and beginning of land (.300Wby - 500 rounds)

 

[Idaho Lefty]

Might ask, Alex Wheeler, to make you, One of his, Sweet .300 Norma Improved, long Ranger's !
A 1,000 Yard ,.. Winner !
RidgeTop's Barrel above, IS, still ,.."Good" !

 

[Bob Wright]

This is my Mk V and the end of free bore and beginning of land (.300Wby - 500 rounds)

Looks almost new! My buddies, well, rode hard and put up wet.

 

[Bob Wright]

Bob,.. Re-read, your LAST, Line,..
MORE than, likely, it's,.. shot, OUT, Toasted !
As a Former Gunsmith, I've noticed that, most, Weatherby Barrels, ( in the Fast Calibers) last, only,.. 850 to 1,100 Rounds !
My Personal .270 WBY Mag. Mk V German went, out at, 850-900 rds then, One Day, the group's,.. Doubled, in size !
Made it into, a LOVELY .338 Win Mag, 25 1/2 " bbl'd.,.. Elk Slayer !
"Clover Leafing" the 210 Nosler's at, 2,975 FPS with, a Douglas Premium, Barrel !
Now I save, the End Flap's of my Bullet Boxes now, to remember,.. "Round Counts" !
"Junk IT" and pick another,.. "Good Caliber" and Barrel !
ONLY, Your "Friend's" will tell You the,.. TRUTH

I'm thinking he might bail on this one. I'm polishing and still running cleaner thru it to get copper out.

 

[DUCKMAN11]

My prayers go out to the shooters shoulder who tries to get this rifle to shoot! Nothing more painfully frustrating than trying to get a lighter weight magnum through load testing/development.

With the current cost of components it's probably going to be cheaper and faster and less painful to start with a good baseline by spinning up a new barrel.

That being said.....I'd definitely do everything a cleaning rod could do to revive it. Scrub the bejesus out of it and if you can't make smaller groups with the next 20 rounds then you have your answer.

 

[tobnpr]

My prayers go out to the shooters shoulder who tries to get this rifle to shoot! Nothing more painfully frustrating than trying to get a lighter weight magnum through load testing/development.

Amen.
Last year my son asked me to build him a custom in .300 WSM.
Nothing exotic (no carbon), 6 lbs. He wouldn't let me brake it.
He shot it well (a couple of his H4350 loads shot under 1/2")- but his right shoulder was black and blue after about 30 rounds.

 

[DUCKMAN11]

Had a buddy with a bad-ish back and shoulder who HAD to have an 8lb 300rum for carrying to a blind.... smh! He bought the components and I got a good load dialed in with some 180s. The rifle has been shot 48 times and 40 of those were me. Recoil fatigue is a real factor in accuracy yet I refuse to use a lead sled. At least you don't have to worry about burning a barrel in a rifle that kicks like Bruce Lee hahaha.

 

[Mowgli Terry]

One of my project guns is a Vanguard in 300 Weatherby. How many rounds estimated had gone through the rifle OP was talking about. Even hot, friend must have shot a fair number rounds through the rifle.

 

[nealm66]

My brothers 300 weatherby vanguard shoots extremely good. He had a brake installed though on my advice. Just too hard to be consistent or see impacts without it.