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270 weatherby bullet choice

 
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  #8  
Old 03-02-2012, 09:48 AM
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Re: 270 weatherby bullet choice

Quote:
Originally Posted by 150pilot View Post
To determine my twist, I put a brush on the end of a cleaning rod and put a tape marker at the 12:00 position. Pushing it slowly and smoothly through from bore to end I got 1.75 turns. This in a 24 inch barrel and I'm figuring the first almost 4 inches have no twist. A 1-10 would have given me 2 full turns right?

I'll see what I can do about the picture.
Do you mean that the chamber has no twist?

Or, do you mean the first 4 inches past the throat have erroded?

If that's the case, it's time to rebarrel.

How does it shoot with factory ammo?

My dad had a 270WBY Mark V many years ago. Still does. But, it's a safe queen because it never shot better than 2 MOA with factory ammo.

Some day I'll get it our and try tuning it up. But, it's a beautiful rifle nonetheless.

-- richard
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  #9  
Old 03-02-2012, 10:40 AM
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Re: 270 weatherby bullet choice

WBY brass, Fed 215M, 130 Hdy interbond, 75.5 gr IMR 7828, OAL3.350(IIRC), Shoots good out of my rebarreled pre 64 M70. 3450 fps. Advertised BC of bullet is .460 The 150 IB is .525
AS ALWAYS, WORK UP YOUR LOAD FROM BELOW for your gun
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  #10  
Old 03-02-2012, 04:35 PM
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Join Date: Mar 2012
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Re: 270 weatherby bullet choice

Richard, Yes I did mean the chamber having no twist, the barrel throat looks like new. Is there a better way to check for twist? I tried the same trick in a 358 Winchester, it has a new barrel but the brush didn't bite as well to give me a steady turn.. I knew the twist but forgot, it's not stamped, and I didn't get the barrel paperwork with the gun.
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  #11  
Old 03-02-2012, 04:56 PM
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Re: 270 weatherby bullet choice

The stability calculator is wonderful. Thank you! I have not yet fired this gun, it followed me home about 10 days ago. The 130 gr Bergers may well be worth a try.

Digger here is an attempt at pictures.

The scope is one I had never seen before. German optics made by Pecar Berlin a variable 3-7 and clear as a bell. This scope was over a hundred bucks in 1967 and came with a 30 year warranty. Sure beats the weaver I bought new for $10 about 1969.
Attached Thumbnails - Click to View Larger
270 weatherby bullet choice-photo-28.jpg   270 weatherby bullet choice-photo-29.jpg  

270 weatherby bullet choice-photo-30.jpg   270 weatherby bullet choice-photo-31.jpg  

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  #12  
Old 03-02-2012, 04:57 PM
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Re: 270 weatherby bullet choice

Using a tight patch push the rod in until you get positive turning. Now mark a straight line top dead center of the rod for sixteen inches or so. Mark the rod where it enters the barrel. Slowly push the rod in until you've made a complete revolution. Mark the rod where it enters the barrel again. Pull the rod out and measure between the two marks. You get one full turn in x amount of inches. Repeat the process a few times to verify your measurement.
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  #13  
Old 03-02-2012, 04:58 PM
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Re: 270 weatherby bullet choice

I see the photos are reversed, it's a right handed gun.
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  #14  
Old 03-03-2012, 11:34 AM
dig dig is offline
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Re: 270 weatherby bullet choice

Great looking rifle and Pecar scopes are a collectors item these days, there is a huge fan club around them. The Germans did and still do make the best glass. With that set up which I would certainly leave alone I would stick with the partitions or grand slams, your probably better off terminal performance wise for the distances you will shoot as well. Congrats on a peice of rifle history.
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