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Long range rifle build.

 
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  #8  
Old 01-26-2011, 02:10 PM
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Join Date: Dec 2010
Location: Denton, Nebraska
Posts: 41
Re: Long range rifle build.

Quote:
Originally Posted by Camshaft View Post
.284-7mm same bullet. Different designation.

I guess i was talking 7mm rem mag vs. .284 rem
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  #9  
Old 01-26-2011, 02:13 PM
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Join Date: Dec 2010
Location: Denton, Nebraska
Posts: 41
Re: Long range rifle build.

Quote:
Originally Posted by strombeckj View Post
+1 on the Krieger barrel, although most are good. I would look at one of the big 6’s shooting a berger 88gr varmint/match for yotes & PD’s and the 115gr VLD’s for the others. Then I would move up to a 25-06 AI. A 6.5mm and a 7mm really aren’t a “varmint round” although a new rifle in a new cal. Is always a good choice in my book.

I had also thought of going with a 6mm of some sort, ppc or remington BR. But 7mm is going to have more knockdown power, especially at longer ranges.
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  #10  
Old 01-26-2011, 03:23 PM
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Join Date: Nov 2010
Location: Colorado, Front Range
Posts: 555
Re: Long range rifle build.

The 7mm has more knock down power for sure. But how much do you really need. look at the info below. may shock you a little bit. (both rounds are putting out over 1000 ft lbs of energy @ 800 yards) the 6mm will have a little more drop at 800 yards but with the higher BC it will deflect the wind better, IMHO I have a easier time correcting for drop then I do drift. Now I would not take a shot on any deer sized game past 300 yards with either if a good broad side shot was not present. However the 7mm with even heavier bullets will close the error factor with poor shot placement. the only reason I bring this up is because you mentioned VARMINTS in your game for hunting. I believe a 7mm is to much for PD's and yotes but perfect for deer sized game. Again this is just my 2 cents worth.... in any case it sounds like your on your way to creating a shooter!

Sorry this has carried over the way it did.

115gr VLD @ 3300 fps...example 6-06 AI
115 gr., .546 B.C.


Range (yards)
Muzzle
100
200
300
400
500
600
700
800
900
1000
Velocity (fps)
3300
3113
2934
2763
2598
2438
2285
2136
1994
1857
1727
Energy (ft.-lb.)
2781
2475
2199
1949
1723
1518
1333
1165
1015
881
761
Trajectory (200 yd. zero)
-1.5
1.0
0.0
-5.1
-14.7
-29.4
-49.9
-77.2
-112.0
-155.7
-209.4
Wind Drift (inches)
0.0
0.4
1.9
4.4
8.0
13.0
19.3
27.2
36.8
48.2
61.7
Come Up in MOA
-1.5
-1.0
0.0
1.6
3.5
5.6
7.9
10.5
13.4
16.5
20.0
Wind Drift (moa)
0.00
0.42
0.89
1.39
1.92
2.48
3.07
3.71
4.39
5.12
5.9

140gr VLD @ 3400 fps...example 7mm RUM


140 gr., .510 B.C.
www.hornady.com
Range (yards)
Muzzle
100
200
300
400
500
600
700
800
900
1000
Velocity (fps)
3400
3196
3001
2815
2636
2464
2299
2140
1987
1841
1703
Energy (ft.-lb.)
3593
3175
2799
2462
2160
1887
1643
1423
1227
1054
901
Trajectory (200 yd. zero)
-1.5
0.9
0.0
-4.8
-14.0
-28.1
-47.9
-74.4
-108.5
-151.3
-204.5
Wind Drift (inches)
0.0
0.5
1.9
4.5
8.4
13.5
20.1
28.4
38.5
50.5
64.9
Come Up in MOA
-1.5
-0.9
0.0
1.5
3.3
5.4
7.6
10.2
12.9
16.1
19.5
Wind Drift (moa)
0.00
0.43
0.92
1.45
1.99
2.58
3.20
3.87
4.59
5.36
6.19



Last edited by strombeckj; 01-26-2011 at 03:28 PM.
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  #11  
Old 01-26-2011, 03:37 PM
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Join Date: Dec 2010
Location: Denton, Nebraska
Posts: 41
Re: Long range rifle build.

Thanks for the info, I found the Hornaday Ballistic chart a while back pretty helpful. varmint wise, this will be secondary to my .223, probably just for the LONG shots.
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  #12  
Old 01-26-2011, 10:43 PM
Platinum Member
 
Join Date: Feb 2006
Location: az
Posts: 2,233
Re: Long range rifle build.

Quote:
Originally Posted by jthod View Post
I guess i was talking 7mm rem mag vs. .284 rem
there is a 284 win and a 280 rem . f for what you are talking about a 6.5-284 would be great.
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  #13  
Old 01-27-2011, 03:18 PM
Junior Member
 
Join Date: Jan 2011
Location: Eugene, Oregon
Posts: 3
Re: Long range rifle build.

maybe look at the 280 ackley improved, I have no personal experience, but from what I have seen it performs nearly as well as the 7mm rem mag.
Another to look at is the 6mm ackley, I just got mine put together, havn't shot it much, but am excited to see how it works with 75 grain pills
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  #14  
Old 01-27-2011, 03:58 PM
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Join Date: Dec 2010
Location: Denton, Nebraska
Posts: 41
Re: Long range rifle build.

another concern I have is of barrel life, and from reading, the 6.5-284 typically lasts 1000-1200.

7mm also has a better selection of bullets, brass, and such.
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