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nosler 55 grain shots 243

 
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  #8  
Old 04-05-2012, 09:30 AM
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Re: nosler 55 grain shots 243

Quote:
Originally Posted by green 788 View Post
you can get them to shoot great out to about 250 yards... they're going to spin too fast for good long range accuracy in a 1:9 .243 win barrel.
NO this is incorrect. . out of a good barrel these will shoot awesome even with an 8 twist. go to 6mmbr ; and the .243 or 6mmbr data. the accuracy load from nosler is with H414. good place to start. otherwise varget and I4064.
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  #9  
Old 04-05-2012, 01:14 PM
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Re: nosler 55 grain shots 243

I'm going to call you on that...

Begin by explaining why barrels are made in different twists...

(Why not just have a 7 twist for everything?)...

I'll post an article later to explain the reasons for this, but for now, we can just discuss it.

Remember, we're talking about long range accuracy... I have not said they won't shoot okay at shorter ranges (to about 250 yards).

Dan
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  #10  
Old 04-05-2012, 04:28 PM
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Re: nosler 55 grain shots 243

H414 with a mag primer in front of the 55 grain Nosler has worked great in 4 243s for me. They seam to do a little better in the 10 twist but have done alright in an 8 twist. Doesnt matter that I cannot find the lands but it does seam to matter on COL.....The current 243 likes the 55 seated to 2.633. By far the best video produceing round useing prairie dogs as a target=Red-Mist!!
Have found the 55s to shoot ½moa + or - @ 100 yards but its tuff to keep them MOA @ 400 yards. Not really a problem as one 243 is set up for 55s inside of 350 yards and another 243 is set up for 105s past 350-400 yards.
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  #11  
Old 04-05-2012, 05:19 PM
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Re: nosler 55 grain shots 243

Mach... here's the reason they're not doing so well at 400 yards... I made this with MS paint... so overlook the crudeness. :o



Lots of folks would say that the bullet does not change it's orientation to fly tip first on the downward part of the trajectory curve... however, if that was the case, you'd see oblong holes in the target at extreme range, and alas, you don't... the holes are nice and round just like at 100 yards. So the bullet *must* alter it's axis to fly tip first.

Pistol bullets, or even deck gun bullets from large ships are about as big around as they are long, so they don't really turn into the wind like long range rifle bullets do. You can hold a paper airplane in front of a running fan and see that unless it turns nose first into the wind, it will easily be pushed aside. Not a perfect analogy, but this is basically what a bullet flying into the wind is going to try to do; it'll try to fly tip first.

Over stabilized bullets resist this needed axial change, just like a spinning gyro-scope resists having it's axis changed.

It might be supposed that 55 grain bullets won't group at 400 yards due to wind, but that's not the case. 22 caliber 55 grain bullets, if not over-spun, will group at extreme range.



Dan
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  #12  
Old 04-05-2012, 07:40 PM
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Re: nosler 55 grain shots 243

thanks

lots of info looks like might want 2 set them out farther got 20 loaded at 2.540 will set 5 out at differnt lenghts 2 suggested.Is there a min col on these bullets

thanks again jeff
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  #13  
Old 04-05-2012, 09:55 PM
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Re: nosler 55 grain shots 243

I'll bet you if you push 5 of those into the case until the total OAL is 2.595" (bullet tip to case head)... those 5 will shoot tighter than any of the others...

It's worth a try.

Dan
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  #14  
Old 04-06-2012, 01:09 AM
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Re: nosler 55 grain shots 243

thanks grenn 788 ill give it a try this weekend suppose 2 be nice 4 shooting....
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