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300 weatherby mag.

 
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  #1  
Old 01-05-2012, 07:27 PM
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300 weatherby mag.

I have a winchester model 70 cassic sporter chambered in 300wby, 26" barrel, break, glass bedded shooting 180gr hornady interlok 3 shots touching at 100yds. looking to make this a 1000+yd rifle. I am new to the long range world and would love some input on what I can do to reach my goal.
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  #2  
Old 01-06-2012, 12:04 AM
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Re: 300 weatherby mag.

Its going to be difficult with factory weatherby freebore, the only way you may decently sucessful is to run a stout charge of H4831sc or right at a compressed load of H1000 under 208 amaxes, and lots of practice.
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  #3  
Old 01-06-2012, 01:26 AM
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Re: 300 weatherby mag.

I'm loading 84.5gr of imr 7828 behind the 180gr hornady interlok. Shoots real wellat 200. Under an inch. Will the heavier bullet hold trajectory longer?
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Old 01-06-2012, 01:40 AM
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Re: 300 weatherby mag.

The bullet you are currently shooting has a ballistic coefficient of .447 the one that I speak of has a .648 but you will need 82-85grns of H1000 and a oal of about 3.650" to get in the ballpark on velocity and accuracy.
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  #5  
Old 01-06-2012, 02:51 AM
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Re: 300 weatherby mag.

Quote:
Originally Posted by coyotelite View Post
I have a winchester model 70 cassic sporter chambered in 300wby, 26" barrel, break, glass bedded shooting 180gr hornady interlok 3 shots touching at 100yds. looking to make this a 1000+yd rifle. I am new to the long range world and would love some input on what I can do to reach my goal.
Start moving your targets out to 1,000yd intervals.

Make a drop/wind chart.

It's already a thousand yard shooter if you do your part.

What scope have you got on it?

The interlock is a great performing bullet. For target shooting you might want to consider the Bergers or Lapua Scenars though.

The Scirocco II is also a great hunting bullett and the 180gr has a .520 BC. They shoot great for me in my 300 Rum and 300WM.

http://www.swiftbullets.com/scirocco...rain-scii.html

They'd be worth a look as well.

The Nosler Accubond 200gr may well be the best all around LR hunting bullett for the .30 Cal so try it as well while you are experimenting.

http://www.nosler.com/bullets/accubond.aspx
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  #6  
Old 01-06-2012, 12:01 PM
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Re: 300 weatherby mag.

the scope is a burris 4.5-14 fullfield II with a ballistic plex reticle. if I zero it at 200 I can bust milk jugs out to 600 using the marks in the reticle.
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  #7  
Old 01-06-2012, 12:24 PM
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Re: 300 weatherby mag.

Alright, lets clear up some stuff. My .300 wby can make a 1000 in its sleep, so there is no need to cram a bunch of any powder to get it to a 1000 yds. but you can if want. First I would like to state that the interlock is a hunting bullet and not a long range match type bullet. I would develop a load with one of the high BC match type bullets. Hornady Amax and BTHP Match, Berger VLD or Hybrid, Sierra MK. I would take advantage of the case capacity of the WBY. and push as high a bc bullet ( over 200 gr ) as I could. Yes I can send a 190gr MK at at over 3100fps but the ballistics are better on the 208gr amax @2950, plus I use less powder a little less pressure and longer barrel life. I found my rifle likes the 208 under 81.5gr of IMR7828ssc, but h1000, Retumbo, H4831, RL22, RL25 all could work well just depends what your rifle likes. I like the 208 gr amax because of quality and cost and high bc, you can't beat $31/100.

I don't see what freebore has to do with anything other than extra velocity. Yes some bullets don't like the jump but your Winchester may not have freebore. It sounds like your rifle is set except for two crucial items (maybe 3) first is your glass. You need a decent scope with at least 10x and enough elevation adjustment to dial up to 25moa. My load takes 23.7 moa at a 1000yds.
Next would be your trigger. You need a light crisp trigger to get consistent accuracy at those ranges. I think under 3 lbs. You maybe able to safely adjust yours down that far but I'm not that familiar with the Model 70 trigger. Mine is set right around 2.5 lbs, I can go lower but this is still my hunting rig I don't want a trigger any lighter for hunting. A quality bipod would be the third thing but you could always shoot of bags without one.

Once you shoot a 1000 yds with this you might get the bug to take it farther. You should be able to take it past 1800 ballistically. You could always do more but then it wouldn't necessarily be a practical hunting rig anymore. Good luck.
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