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Building a 240 Weatherby Magnum...
Discussions related to Guns and Firearms
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twofifty
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Joined: Feb 07, 2007
Posts: 158
Location: BC Rockies

PostPosted: Wed May 07, 2008 6:56 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Hey D/S I've just finished reading the whole thread and have to say that I thoroughly enjoyed reading and looking at your .240Wby build.

Your pics are of such clarity, and so well sequenced, that I sense ( I was going to say 'understand' but that would be presumptuous on my part) the attention to detail and skill required.

Anyhow, she should be a sweet shooter. Looks good too, in a subdued non-brash kind of way...a sleeper of sorts. Shocked

D/S, no offense meant: in the muscle car days a sleeper was the simple clean lookind car that would blow the doors off the chrome-laden competition (this last bit is provided for the younger ones among us (Dimitri?) who did not get to drive 300+hp pony cars).

Now lets all pray for the rain to stop falling in OK, so we can see how this puppy prints paper.
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foreign
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PostPosted: Thu May 08, 2008 4:32 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

hey ds. i was wondering what you opinion on bedding a 700 .308 was. how hard is it to do with maintaining the mag well and the little box the ammo sits in. would you just bed the lug? would be alot easier if it was just a single shot.
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Deer Sniper
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PostPosted: Thu May 08, 2008 7:26 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Foreign,

bed the complete action area as well as the recoil lug and about 1 inch in front of that and no more. Also, put 3 or 4 layers of masking tap on the bottom of the recoil lug. Everything else, bed solid...

Any questions, just ask!

D/S
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foreign
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PostPosted: Sun May 11, 2008 12:26 am    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

hey ds have u managed to get a shoot out of the rifle yet,im real keen to know what it will do.cheers
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Deer Sniper
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PostPosted: Sun May 11, 2008 7:24 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Here is an accuracy report on the new 240 Weatherby Magnum...



Here are a couple of targets followed by the loads that was used...









CASE: Norma 240 Weatherby Magnum



PRIMER: CCI-200

POWDER: IMR-4350 / 51.0 gr.

BULLET: Sierra 85 gr. B.T. - H.P. Game King

VELOCITY: 3,817 fps.





*********************************************************









CASE: Norma 240 Weatherby Magnum

PRIMER: CCI-200

POWDER: IMR-4350 / 50.5 gr.

BULLET: Hornady 87 gr. V-MAX

VELOCITY: 3,732 fps.



*********************************************************











CASE: Norma 240 Weatherby Magnum

PRIMER: CCI-200

POWDER: IMR-4350 / 52.0 gr.

BULLET: Remington 80 gr. Power Lokt Hollow Point

VELOCITY: 3,918 fps.





*********************************************************





Fireform load was as follows -



CASE: Norma 240 Weatherby Magnum

PRIMER: CCI-200

POWDER: IMR-4350 / 45.0 gr.

BULLET: Remington 80 gr. Power Lokt Hollow Point





*********************************************************





These were the three bullets that were used to shoot the above groups. The bullet on the left is the 80 gr. Remington, center is Sierra's 85 gr. bullet and then Hornady's 87 gr. V-MAX...













Extreme spread between all rounds fired was 20 fps. or less!



Notice also that all groups were fired at 200 yards instead of 100 yards. Reason being is that most high velocity bullets of any caliber do not fully stabilize until at least the 200 yard mark, if not further....
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Doublejs
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Joined: Nov 29, 2007
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Location: SW Pennsylvania

PostPosted: Sun May 11, 2008 7:35 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Impressive!
especially for 200 yrd groups.
Nice photos also.
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Deer Sniper
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PostPosted: Sun May 11, 2008 7:37 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Thank you Sir....

D/S
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Pumpkinslinger
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Joined: Sep 22, 2007
Posts: 4352
Location: NC foothills

PostPosted: Sun May 11, 2008 7:48 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

DS, well done!

_________________
Mike

"I ain't no better than anyone else, and there ain't no one better than me!" Ma Kettle

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gelandangan
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PostPosted: Sun May 11, 2008 8:28 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Deer Sniper..

This question came a bit late in the thread but I got to ask somebody about it.

Usually, what I heard is when chambering a new barrel, you thread them first then you ream the chamber.
Supposedly this will help in headspacing with go/nogo gauges to check the distance from the bolt to the shoulder of the cartridge.
What I saw from your work here, you ream the barrel first then you thread it..
So how do you get the headspace right?

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


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foreign
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PostPosted: Sun May 11, 2008 8:50 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

nice ds. good shooting on your part as well.
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Vince
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PostPosted: Sun May 11, 2008 9:29 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Awesome levels of accuracy DS. It certainly appears to me that your have achieved your aim with this project...and done a damn fine job into the bargain.

Well done mate.

Cheers, Vince

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(Never let the bastards grind you down)

Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God.

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(Without Commitment, Nothing Gets Done)

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Deer Sniper
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PostPosted: Sun May 11, 2008 10:01 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Vince, Foreigh and Pumpkinslinger - thank you for the compliments, I appreciate it. I am quite satisfied with the way things worked out and needless to say, my wife is more than happy with her new rifle....

Gelandangan - I have never seen a gun that would fire go/no go gauges. This is something that I have no use for. Personally, I always use cases that have been full length resized with the original dies that will be used for reloading that particular cartridge...

When cutting the bolt body counterbore, I cut it to the same exact depth of the bolt body and when the barrel is screwed into the receiver, I set it up to stop .003 short of contact with the barrel. The chamber is also cut to where the case head also stops .003 short of jamming against the case head on a chambered case that has been full length resized. After the barrel is screwed into the receiver and tightened, if you put a .003 steel shim against the case head and tried to close the bolt, it will not completely close and lock down but anything less than that will allow the bolt to fully close and lock. This is the way I have been chambering and building rifles and hunting handguns for 25 years now....

D/S
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gelandangan
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Location: Sydney Australia

PostPosted: Mon May 12, 2008 12:01 am    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Thanks for the explanation Deer Sniper.

I must say that although a bit unusual to my limited experience, your method is definitely producing great result.

Well done.

_________________
A straight line is the shortest distance between two points.
A smile is the shortest distance between two people.

The government I trust .. is my .45-70 Government.

Do - Not try!


gelandangan.weebly.com/
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Deer Sniper
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Posts: 313

PostPosted: Mon May 12, 2008 8:23 pm    Post subject: Re: Building a 240 Weatherby Magnum... Reply with quote

Thank you Sir and you are welcome for the explanation. I just hope that it was good enough for you to understand. Alot of times, it's a lot easier to do the work and show the pictures than it is to try and explain things....

D/S
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