Quote:
ou don't need a suppressor or a brake. If you are shooting 1000 yards in the F Class
Considering that brakes and suppressors are prohibited by NRA rules in F-Class competition, this is kind of moot.
We just had this discussion over in the other thread
http://www.thehighroad.org/showpost....72&postcount=6
I strongly recommend reading that and taking my advice in the "Part I" article that Pulse posted the link to (thanks).
1000 yards isn't that far. Most people who haven't shot that far vastly over-estimate what is required to shoot that far.
Look at a moderate case size in 6.5 mm, such as the .260 Rem, 6.5x47, 6.5 Creedmoor, 6.5x55, 6.5-284, 6.5-06, etc. If you must go to a magnum case, the 7mm RM and 7mm WSM have better ballistics with less recoil than the .300's.
An accurate rifle isn't worth anything if you can't shoot it enough without pain to get the experience and skill to make long-range hits. Hmm:
Quote:
The recoil pounded the hell out of me though!
Sounds like a great endorsement of high-recoil calibers without muzzle brakes.
Here's a ballistic comparison of some relevant calibers, sorted by wind drift at 1250
Code:
_Bullet_ _BC_ _MV_ 0 250 500 750 1000 1250 | YARDS
338LM 300 0.77* 2700 > 0.00 2.61 11.00 26.18 49.34 81.98 | wind (inches)
7RM 180 0.684 2950 > 0.00 2.60 11.01 26.26 49.65 82.82 | wind (inches)
300RUM 240SMK 0.71* 2850 > 0.00 2.62 11.08 26.40 49.94 83.44 | wind (inches)
338LM 250 0.675 2950 > 0.00 2.64 11.17 26.67 50.49 84.30 | wind (inches)
7RM 168 0.643 3050 > 0.00 2.64 11.23 26.88 51.03 85.48 | wind (inches)
300RUM 210BER 0.633 3000 > 0.00 2.76 11.71 28.08 53.40 89.59 | wind (inches)
6.5-284 139 0.615 2950 > 0.00 2.91 12.40 29.80 56.85 95.59 | wind (inches)
300WM 210BER 0.633 2900 > 0.00 2.89 12.30 29.53 56.21 94.32 | wind (inches)
243WIN 115 DTAC 0.585 3100 > 0.00 2.86 12.19 29.39 56.21 94.89 | wind (inches)
708 168 VLD 0.643 2700 > 0.00 3.15 13.41 32.21 61.36 102.68 | wind (inches)
260 139 0.615 2800 > 0.00 3.14 13.38 32.20 61.52 103.35 | wind (inches)
6.5CM 0.585 2810 > 0.00 3.29 14.08 34.04 65.31 110.06 | wind (inches)
308 155 0.508 2900 > 0.00 3.66 15.82 38.68 75.13 127.84 | wind (inches)
308 175 FED 0.51* 2650 > 0.00 4.27 18.56 45.74 89.14 150.37 | wind (inches)
338LM 300 0.77* 2700 > -0.00 0.76 2.70 5.05 7.82 11.12 | drop (mil)
7RM 180 0.684 2950 > -0.00 0.59 2.23 4.25 6.69 9.62 | drop (mil)
300RUM 240SMK 0.71* 2850 > -0.00 0.66 2.41 4.55 7.13 10.22 | drop (mil)
338LM 250 0.675 2950 > -0.00 0.59 2.24 4.27 6.73 9.70 | drop (mil)
7RM 168 0.643 3050 > -0.00 0.54 2.08 4.01 6.36 9.23 | drop (mil)
300RUM 210BER 0.633 3000 > -0.00 0.57 2.18 4.20 6.66 9.69 | drop (mil)
6.5-284 139 0.615 2950 > -0.00 0.60 2.29 4.41 7.03 10.27 | drop (mil)
300WM 210BER 0.633 2900 > -0.00 0.63 2.37 4.55 7.21 10.49 | drop (mil)
243WIN 115 DTAC 0.585 3100 > -0.00 0.52 2.05 4.00 6.42 9.44 | drop (mil)
708 168 VLD 0.643 2700 > -0.00 0.78 2.81 5.35 8.45 12.28 | drop (mil)
260 139 0.615 2800 > -0.00 0.71 2.60 4.99 7.94 11.61 | drop (mil)
6.5CM 0.585 2810 > -0.00 0.71 2.62 5.05 8.09 11.91 | drop (mil)
308 155 0.508 2900 > -0.00 0.66 2.53 4.98 8.16 12.33 | drop (mil)
308 175 FED 0.51* 2650 > -0.00 0.87 3.17 6.24 10.28 15.61 | drop (mil)The first three loads have this for recoil (on a 18# gun):
338LM/300: 11.5 FRE
7RM/180: 4.9 FRE
300RUM/240: 8.2 FRE
Going down a bit, the 6.5-284 has 2.9
243/115: 2.2 FRE
.260/139: 2.7 FRE
For reference, in the Colorado practical long-range shooting group, many have gone away from .308, .300, and 7RM to the .260 (or similar calibers) for great ballistics, low cost and recoil, and general easy "shootability."
At the 2008 Steel Safari,
Quote:
The .260 Remington was the dominant cartridge (32%) followed by .308 Winchester (26%), then 6XC (9%), and one each of .260-AI, .270 Winchester, .300WM, .243WIN, 6.5-06-AI, 6.5-06, 7 WSM, 7 RSAUM. The .264/6.5mm bore diameter was completely dominant (43%) followed by .30 (30%) and then 13% shooting .243 and .284.
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