PDA

View Full Version : New 240 Weatherby in the works...



Weatherby Assassin
11-15-2007, 05:02
Well, it mat not be a Weatherby rifle but, it will be in a Weatherby chambering, namely the 240 Weatherby...

I am building another 240 Weatherby and here is my list of specifications for this new rifle:

ACTION: Remington 788 / set-up as single shot / action completely blue-printed...

BARREL: Lilja / heavy varmint taper with .815 muzzle diameter / 30 inch barrel length / 3-groove / 1-13" twist / muzzle brake added to barrel / barrel chambered to the 240 Weatherby...

TRIGGER: CANJAR - rebuilt and adjusted to 18 ounces...

STOCK: H-S Precision Hunter/Target model...

SCOPE BASE: Weaver 2-piece...

RINGS: Burris Signature ZEE rings...


SCOPE: still deciding between a Burris 8X-32X and Bushnell 4200 Elite in 8X-32X

I'll post pictures of this once completed it you guys are interested....

W-A

Heat
11-15-2007, 13:56
I see you like the 240 Weatherby there WA... If it shoots as good as it sounds you should have two that will out shoot just about anything :p...

How do you intend to handle the freebore?? i.e. standard Weatherby freebore or a custom length...

Ken....

Weatherby Assassin
11-16-2007, 01:14
Hi Ken,

yes Sir, I am very partial to the 240 Weatherby as well as most high velocity 6mm's in general...

By going to a 3-groove 13 twist barrel, that will allow for some reduction in the peak pressure curve and as such, I will most likely "throat" this one specifically for Sierra's 85 gr. B.T. - H.P. Game King bullet in that I will be able to touch the lands while still having adequate neck tension on the bullet...

Since most guys that I build guns for are handloaders, I will usually custom throat to their specifications. But, if only factory loads are going to be shot, then my chamber will have the usual Weatherby freebore...

I just finished both a 257 Weatherby and a 30-378 Weatherby for the same customer and since he shoots nothing but handloads, both chambers were custom throated per his chosen bullet weight and length - throated according to the "dummy round" sent in for each specific cartridge....

W-A

Heat
11-16-2007, 13:56
Very interesting WA... I learn something new everyday.. I have to ask the question now, are you a gunsmith or do you do all of this as a hobby??

Ken....

Weatherby Assassin
11-17-2007, 03:05
Ken,

I have been a Riflesmith since 1983....

W-A

Heat
11-19-2007, 14:14
I thought that might be the case WA, thanks...

Ken....

Broz
11-19-2007, 14:32
Sounds like a great project. It should be a screamer. I have a Wby Vanguard that I rebarreled to 6mm/284. I used a 26" Shaw with a 1-10. It shoots 70 grain Sierra BT HP's @ 4100. We just got home from a trip to Wy. where we used the gun for antelope with some 85 gr Sierra game kings. We were very pleased with its performance.

What do you look to get for Velocity from that 30" 1-13 ?


Jeff

Weatherby Assassin
11-20-2007, 04:01
Hi Jeff,

in mid stream, the Remington 788 action was swapped for a Remington 700 ADL short action but the cartridge and everything else will remain the same...

Since the 1-13" twist will be borderline for bullet stability with my favorite Sierra Game King bullet, it will have to be pretty hard. Just guessing, I'm gonna say that the 240 Weatherby from this Lilja barrel will probably push the 85 gr. B.T. - H.P. Game King bullet to around 3,800 fps....

I was thinking about posting pictures of this gun being put together if anyone would be interested in seeing such a project....

W-A

BigHorn WBY
11-20-2007, 04:27
Certainly post pictures. I am thinking of trying a 3 groove for my 6. Any pro's or con's on it ????? Still debating the 240 or a 284 case, or a wssm, or a ????? Want a 107 at 3000.

Weatherby Assassin
11-20-2007, 04:51
I use Lilja barrels on a regular basis and his 3-groove barrels are second to none. They are easy to clean, offer higher velocity potential than conventional 6-groove barrels, copper fouling is held to a very minimum and they are just plain accurate...

As far as "cons" against the 3-groove barrels - none that I can think of...

A 6mm-284 with a 1-8 twist will push a 107 gr. bullet to 3,000 fps. and do it VERY ACCURATELY. H-1000 is the powder of choice if you decide to go with something like this. Also, bullets should be seated hard into the lands, something like around .009 to keep the case head jammed back against the bolt face and bullet to bore alignment in greater alignment...

Another thing with the 6mm-284 as well as the 6.5-284, whoever cuts your chamber, ask him to NOT cut the base more than .002 over base diameter. Reason being is that is the base is cut oversize, even with mild loads, the primer pocket will loosen up in a hurry and as such, your cases would become useless. Most 6.5-284 brass from Lapua or Norma will have a base diameter of .498 to .4985. Ask your gunsmith to cut the base no larger than .4995 and your case life will be excellent....

W-A

BigHorn WBY
11-20-2007, 05:18
I will do all the work. Thanks for your insight on the chamber specs. I am no fan of the 284 case but will be deciding on something to propel one of those big dog 6mm bullets "way out there".

Weatherby Assassin
11-20-2007, 05:29
The 240 Weatherby will exceed 3,000 fps. with the 107's as will the 6mm-06. If you're really into the Weatherby's, the 240 Weatherby would be an excellent round because of the high quality of brass....

W-A

BigHorn WBY
11-20-2007, 05:40
I agree but have some worries about price of a quanitity of brass. Pretty dumb thou, worring about a 50 bucks in brass for the life of a 500 dollar barrel:D

Heat
11-20-2007, 14:01
I was thinking about posting pictures of this gun being put together if anyone would be interested in seeing such a project....

W-A

Post away, I'm thinking it would be very interesting for those of us out here that don't do ANY smithing ;)...

Ken....

Weatherby Assassin
11-20-2007, 17:14
This rifle will actually be for my wife as she is the one who picked out the barrel and stock...

As far as the caliber goes, I am the one who suggested the 240 Weatherby but she is still undecided between that cartridge or the 6mm Ackley Improved or maybe even the 6mm-284...

As soon as I get a few more customers guns out of the shop, I'll start the picture posting....

W-A