Bob Wright
Well-Known Member
If for no other reason that the 6.8 western rifles have a faster twist rate to load heavy for caliber, that would be the main improvement. 270 win with a 10 twist was it's limitation to this day.
Based on what data is shown for the factory ammo and the limited load data on Hodgdon's site, the 6.8 Western is not a major improvement or for that matter an improvement at all when compared to the 7 Rem mag. In fact, it is closer to the performance of a 284 Win.
From Guns and Ammo article on the 6.8 Western:
all listed bullet BC is G1
165 gr. Accubond LR — 2970 fps (bc .620)
130 gr. Ballistic Silvertip — 3275 fps (bc .433)
170 gr. Ballistic Silvertip — 2920 (bc .560)
140 gr. AccuBond CT — 3200 (bc .433)
175 gr. Sierra Gameking – 2835 (bc .560)
150 gr. Ballistic Silvertip — 3120 (bc .496)
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Hodgdon's site:
top load for 170 Berger EOL ---- 2938 top load listed (bc .662)
top load for 165 Nosler LR accubond --- 2956 (bc .620)
My short action 23" 284 Win sporter using OAL of 3.025" shooting a 168 Berger VLD (bc .618) has a velocity of 2925 fps. Crunching the numbers this puts the 6.8 Western's performance just slightly ahead of this particular 284 Win.
Using JBM and all inputs the same (4000 ft 65 degrees 3" high at 100 yds etc) here are the 500 yd comparisons: 6.8 Western 165 LR accubond 2970 fps vs 284 win 168 Berger VLD 2925 fps
6.8 Western drop -25" 9.6 drift in 10 mph crosswind vel 2422 fps energy 2149 ft/lb
284 Win drop -26.3" 9.6" " " " " " vel 2390 fps energy 2131 ft/lb
I would imagine with the larger case capacity of the 6.8 Western that a handloader might be able to improve on the performance of factory ammo but it will never equal a 7 Rem mag.
want a little secret?Faster twist rate in factory Browning barrel was the key to better accuracy. I used a 150 Berger with H1000 and got 1/2 MOA results out to 750 yards. Tried the Sierra with 1 MOA accuracy to 600 yards. The brass quality is the key for improvement - the Browning or Winchester just doesn't cut it even when cleaning, annealing, weight sorting and inside neck reaming. I used RCBS dies.
I love my 284 winchesters, I have 3 of them. Two of them have clips though and I'm limited in how far out i can seat bullets. And the clips for these particular rifles have not proven to be completely reliable although all three have shown to be fairly accurate. I also have settled on 23" for barrel length for this caliber as my calculations show this length to be the optimum for best velocity and handiness. My handloads have closely approached 7MM RM factory velocities in bullet weights of 145 GR and under.Based on what data is shown for the factory ammo and the limited load data on Hodgdon's site, the 6.8 Western is not a major improvement or for that matter an improvement at all when compared to the 7 Rem mag. In fact, it is closer to the performance of a 284 Win.
From Guns and Ammo article on the 6.8 Western:
all listed bullet BC is G1
165 gr. Accubond LR — 2970 fps (bc .620)
130 gr. Ballistic Silvertip — 3275 fps (bc .433)
170 gr. Ballistic Silvertip — 2920 (bc .560)
140 gr. AccuBond CT — 3200 (bc .433)
175 gr. Sierra Gameking – 2835 (bc .560)
150 gr. Ballistic Silvertip — 3120 (bc .496)
======
Hodgdon's site:
top load for 170 Berger EOL ---- 2938 top load listed (bc .662)
top load for 165 Nosler LR accubond --- 2956 (bc .620)
My short action 23" 284 Win sporter using OAL of 3.025" shooting a 168 Berger VLD (bc .618) has a velocity of 2925 fps. Crunching the numbers this puts the 6.8 Western's performance just slightly ahead of this particular 284 Win.
Using JBM and all inputs the same (4000 ft 65 degrees 3" high at 100 yds etc) here are the 500 yd comparisons: 6.8 Western 165 LR accubond 2970 fps vs 284 win 168 Berger VLD 2925 fps
6.8 Western drop -25" 9.6 drift in 10 mph crosswind vel 2422 fps energy 2149 ft/lb
284 Win drop -26.3" 9.6" " " " " " vel 2390 fps energy 2131 ft/lb
I would imagine with the larger case capacity of the 6.8 Western that a handloader might be able to improve on the performance of factory ammo but it will never equal a 7 Rem mag.
is your 6.8 western a custom rifle or factory & have you shot any of the factory ammo if so how did it shoot?I have a 6.8 Western and a 270 WSM with a 7 1/2 Twist barrel. I shoot 600 and 1000 yards weekly, and both of these rifles shoot remarkably well. The higher BC bullets shoot with more precision at these longer yardages. This is the true advantage of these cartridges. I think the Winchester 270 is a great gun, but cannot reach out to 1000 yards with the same accuracy or energy as the 270 WSM with a 7 1/2 Twist barrel or 6.8 Western. Would I shoot a deer out to those yardages, maybe 500 yards but no further, so realistically any of these other cartridges mentioned could do as good as a job or even better at the shorter distances? I believe the 6.8 Western will not be as popular as the 6.5 Creedmoor, but it will have a following and its popularity continue to grow. I for one enjoy both the old and new cartridges. Just got back from deer camp, what did I use to shoot my deer. My 30-06, 2003 Winchester 70. Why didn't I use my 6.8 Western ... tradition of course.
Thanks for posting this AZ. I found the link to the artical you quoted. I noted those are all listed factory velocities and there was no chrono of any of them in the story. G&A 6.8 Western story no chronoBased on what data is shown for the factory ammo and the limited load data on Hodgdon's site, the 6.8 Western is not a major improvement or for that matter an improvement at all when compared to the 7 Rem mag. In fact, it is closer to the performance of a 284 Win.
From Guns and Ammo article on the 6.8 Western:
all listed bullet BC is G1
165 gr. Accubond LR — 2970 fps (bc .620)
130 gr. Ballistic Silvertip — 3275 fps (bc .433)
170 gr. Ballistic Silvertip — 2920 (bc .560)
140 gr. AccuBond CT — 3200 (bc .433)
175 gr. Sierra Gameking – 2835 (bc .560)
150 gr. Ballistic Silvertip — 3120 (bc .496)
======
Hodgdon's site:
top load for 170 Berger EOL ---- 2938 top load listed (bc .662)
top load for 165 Nosler LR accubond --- 2956 (bc .620)
My short action 23" 284 Win sporter using OAL of 3.025" shooting a 168 Berger VLD (bc .618) has a velocity of 2925 fps. Crunching the numbers this puts the 6.8 Western's performance just slightly ahead of this particular 284 Win.
Using JBM and all inputs the same (4000 ft 65 degrees 3" high at 100 yds etc) here are the 500 yd comparisons: 6.8 Western 165 LR accubond 2970 fps vs 284 win 168 Berger VLD 2925 fps
6.8 Western drop -25" 9.6 drift in 10 mph crosswind vel 2422 fps energy 2149 ft/lb
284 Win drop -26.3" 9.6" " " " " " vel 2390 fps energy 2131 ft/lb
I would imagine with the larger case capacity of the 6.8 Western that a handloader might be able to improve on the performance of factory ammo but it will never equal a 7 Rem mag.
My 6.8 Western is rebarreling of a 2003 year 270 WSM Winchester Coyote that I had. I added a 27' Brux Rem Varmint Barrel ($300) and a Carlson ($35) muzzle brake. I reload and have excellent groups. The factory ammo is good but of course my reloads are better. As I have a long barrel, my velocities are all greater than those published buy Winchester or Browning. I have better groups with the 165 Nosler ABLR bullets in both the hand loads and factory. At 200-yard sight-in I have 3/4" groups, of course off of a bench. My velocity at 1000 yards is about 1600 fps, so I am pushing the bullet. I find very little difference between the 6.8 Western and a 270 WSM with a 7 1/2 twist. I do think at this time the 6.8 Western is a little more efficient than the rebarreled 270 WSM. A little less powder required for the same velocity. In doing a ladder test, the nodes are similar. I really wanted to take a deer with it this year, but was in my alternative blind and is a little tight, so my 30-06 with a 24" barrel was easier to maneuver in that stand.is your 6.8 western a custom rifle or factory & have you shot any of the factory ammo if so how did it shoot?