460 Weatherby to 458 Lott

Dean2

AH senior member
Joined
Sep 26, 2018
Messages
51
Reaction score
61
Location
Edmonton Alberta
Media
17
Hunting reports
Africa
1
Can anyone tell me if it is possible to take an existing 460, set back the barrel and rechamber it to 458 Lott. I know the Rim Daimeter of the 460 is .579 and the Lott is only .532. so how hard is it to make the Weatherby bolt to work with the Lott cartridges. Any feed from the mag, extraction, ejection issues to consider? Thanks for the help.
 

matt85

AH legend
Joined
Jan 7, 2014
Messages
2,659
Reaction score
1,938
Location
WA, USA
Media
28
Hunted
USA, South Africa, and Namibia
i imagine it would be fairly difficult! the two cartridges share no dimensions other then bullet diameter.

it would be significantly cheaper to simply buy a 458 lott.

-matt
 
  • Like
Reactions: WAB

Forrest Halley

AH fanatic
Joined
Jul 28, 2019
Messages
726
Reaction score
897
Location
VA, USA
Media
25
You can take the barrel off, set it back in the closet, and install a .458 Lott barrel. The dimensions are not similar. I'd imagine the bolt face would cause issues with reliable extraction left as is.
What's the reason for getting out of the Weatherby power level? If you're already set up with brass and components why would you want to worry about another caliber?
 

machinistbutler

Silver supporter
AH veteran
Joined
Feb 16, 2012
Messages
238
Reaction score
515
Location
Alberta Canada
Media
53
Hunting reports
Africa
1
Hunted
Canada Namibia
The 450 Rigby might be possible , case dimensions are closer , not sure how much it would have to be set back or where to get it done here. A new barrel to the Lott may be your best bet.
 

Dean2

AH senior member
Joined
Sep 26, 2018
Messages
51
Reaction score
61
Location
Edmonton Alberta
Media
17
Hunting reports
Africa
1
I am in Canada so you are right, unless this completely stupid Order In Council is amended are better yet repealed, the 460 exceeds the 10,000 Joule limit. I can sell the gun into the States, I actually have it listed in the classifieds on here but being Left Handed the market may be a little limited. So it is sell or find a way to lower the power level below 10,000 Joules (7,500 Ft/lbs).

I did a little more research and the large difference in rim diameter would be the biggest problem, .579 vs .532 on the Lott. Fixing the bolt face would require an insert and I am not sure I want a dangerous game gun built that way. Since the barrel has express sights it would also be tricky to get it timed just right.

Easiest option is to rebarrel it to 378 Weatherby, have the barrel high gloss blued and the sights, and muzzle brake re-installed at a cost of abut $1,500. The other option I am researching is to set back the barrel and rechamber to the 460 A Square Short, which is a shortened version of the 460 Bee case with a 500 grain bullet doing about 2400 FPS.

The 450 Rigby idea has merit as well. Machinist is right, the Rim, case dimensions are a lot closer to the Bee than the Lott is.

Any other ideas are more than welcome.
 
Last edited:

machinistbutler

Silver supporter
AH veteran
Joined
Feb 16, 2012
Messages
238
Reaction score
515
Location
Alberta Canada
Media
53
Hunting reports
Africa
1
Hunted
Canada Namibia
The Rigby seems like a great cartridge! I see you are in Edmonton as well. The 450 Rigby falls under the joule limit imposed by our idiotic government . By them trying to ban the 50 BMG they have really imposed some ridiculous restrictions on sporting cartridges.

If your rifle feeds the big Weatherby well it should work great with the Rigby. I am not sure how much extra work would be required for the feeding and the bolt to downsize into the Lott cartridge.
 

colorado

AH elite
Joined
May 8, 2011
Messages
1,080
Reaction score
1,038
Media
57
An easier conversion is to a 495 ASquare. You'd have a unique rifle in a really nice cartridge, that will not exceed the Joule limit. Unfortunately the 500 A2 does exceed the limite and for either one you will need to be a handloader.
 

Dean2

AH senior member
Joined
Sep 26, 2018
Messages
51
Reaction score
61
Location
Edmonton Alberta
Media
17
Hunting reports
Africa
1
no shit ? what a bunch a retards in charge SORRY Fellas - thats completely absurd-pathetic morons
Don't be sorry, we think they are a pathetic bunch of morons too, and it goes WAY past just the latest crap with gun laws. This is the most openly corrupt, anti individual rights, government in the history of Canada. It is so bad that there is a very strong Separation movement in Western Canada building up. It is starting to have over 30% support and I never though I would ever see something like that in the West.

As to the gun question, since I reload there really are no limitations on what Cartridge I can pick so the 460 A Square and the 378 Bee seem to be the two leading candidates if the gun doesn't sell into the States.
 
 

 

 

Latest posts

Latest profile posts

Just came from a hunt and already longing for the bush
JPmbogo wrote on yhc's profile.
I have factory loaded Hornady 450 NE 3 1/4 DGS that I am selling for not much more than the brass itself at $75/box - see my listing for same.
Justbryan wrote on Rafter JK's profile.
Get Crazy Larry yet? Wishing I had shot Alpine Ibex too!
 
Top