Barrel life 6.5/284 vs. 270 Wn
- Thread starter Leakingaz
- Start date
The 6.5-284 can go in as few as 700 rounds. Average is about 1000. (My last was done at 750) The 270 will last longer, but the bullets for these are really poor for long range. Having said that, Canadian bullet maker Matrix bullets has only just making great 270 long range bullets, but you need a 1:8" twist barrel, and I can guarantee you don't have that in your gun.
Depends on what you want to do with it, but you can't go wrong with a 6BR for short and long range. You also can't go wrong with a 260 or a 6.5X55 if you want terrific long range ballistic coefficients and good bullet selections.
the 6.5-284 is too much of a good thing, and you can achieve the exact same results with cartridges that are nowhere near as hard on barrels.
Guys shooting in 900M/1000yd long range precision competition are using 7mm cartridges such as the 284 Winchester to take advantage of the amazing 7mm bullets.
Depends on what you want to do with it, but you can't go wrong with a 6BR for short and long range. You also can't go wrong with a 260 or a 6.5X55 if you want terrific long range ballistic coefficients and good bullet selections.
the 6.5-284 is too much of a good thing, and you can achieve the exact same results with cartridges that are nowhere near as hard on barrels.
Guys shooting in 900M/1000yd long range precision competition are using 7mm cartridges such as the 284 Winchester to take advantage of the amazing 7mm bullets.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Both are going to be hard on barrels so if you think 1000 accurate rds is too short, look else where.
What are you trying to do with this rig?
The longest barrel life competitive and LR plinking rd is the 223. Sub MOA barrel life is likely in the 4000 to 6000rds range. F TR competitive life is probably in the 3000ish rds range.
Except for the 308, nothing last as long.
But a whole bunch of options drift less in the winds at LR.
you have to always balance ballistics and bore wear.
Jerry
What are you trying to do with this rig?
The longest barrel life competitive and LR plinking rd is the 223. Sub MOA barrel life is likely in the 4000 to 6000rds range. F TR competitive life is probably in the 3000ish rds range.
Except for the 308, nothing last as long.
But a whole bunch of options drift less in the winds at LR.
you have to always balance ballistics and bore wear.
Jerry
It has to do F class 1K matches even if only once a year . The 308 is questionable @ 1000 , the 6.5/284 has a voracious appetite for stainless steel , so i thought the 270 may have better table manners . Would the 280 be a consideration ? As you can see, i'm choosing big bore over the sensible smaller choices.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
The 308 has been used for decades easily competing at 1200yds. Look up Bisley Palma shooting. These guys and gals really know how to drive.
Bullet tech has changed so much that distance is really no big hindrance to the 308 or most other chamberings we might want to use in competition.
Decide if you want to play in F TR or Open. If you want to experiment, then Open is the place to be.
ALL of your options are hard on barrels....PERIOD
There is no F open option with the highest possible ballistics that has a barrel life over 1000rds. Most will be in the 800rds range.
You don't ask about fuel mileage if you want the fastest top fuel dragster.
If you want longer life, you need to compromise, burn less powder and drift more.
There is no free lunch.
Jerry
Bullet tech has changed so much that distance is really no big hindrance to the 308 or most other chamberings we might want to use in competition.
Decide if you want to play in F TR or Open. If you want to experiment, then Open is the place to be.
ALL of your options are hard on barrels....PERIOD
There is no F open option with the highest possible ballistics that has a barrel life over 1000rds. Most will be in the 800rds range.
You don't ask about fuel mileage if you want the fastest top fuel dragster.
If you want longer life, you need to compromise, burn less powder and drift more.
There is no free lunch.
Jerry
280AI or the 284 Winchester are good choices
I still say a good 6.5 is nothing to sneeze at. The 140 Berger, particuarly if pointed, does not give up very much to a 7mm 180 berger. You will learn to appreciate having much less recoil than a heavy 7mm.
FYI "Shockman" has been campaigning a 6.5-08 (260) across Canada this past year and kicking serious butt with it.
I still say a good 6.5 is nothing to sneeze at. The 140 Berger, particuarly if pointed, does not give up very much to a 7mm 180 berger. You will learn to appreciate having much less recoil than a heavy 7mm.
FYI "Shockman" has been campaigning a 6.5-08 (260) across Canada this past year and kicking serious butt with it.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Today, precious few bullet (ie 1) will tumble at 900yds. Berger, Lapua, Hrn, Sierra all make bullets that will happily travel WAY past that.
The furthest I have shot a 308 accurately was just over 1400yds. I have seen the 308 go 1800yds.
I took a 223 to 1 mile. Except for dealing with the massive drop, the bullet combo didn't care about the distance.
Lots and lots of F TR shooters use the 308 and have no issue hitting the V bull at 1000yds.
There are receipes from 155gr to 210gr VLD's that work just fine out of the 308. 185gr VLD seems to be the new happy happy combo.
I am going 223/90gr VLD cause I hate recoil.
Most F TR rigs will use a 28" min length with some going as long as 32". 12 twist. Long throat to get more fuel into the case. Have at it.
There is no voodoo to make the 308 work superbly at silly distances anymore.
Jerry
omb
I read a while back where a shooter was making comments about a previous 1K match that was windy and said the 6BR's and 223's did ok, but the 308's were blown off the paper. How is that ?
.
famous saying on this forum
" jus sayin "
I read a while back where a shooter was making comments about a previous 1K match that was windy and said the 6BR's and 223's did ok, but the 308's were blown off the paper. How is that ?
.
famous saying on this forum
" jus sayin "
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
I have the 'fastest' car on the line but got a crappy time.
Must have been a bad tank of gas, or oil in my lane, or crosswinds, or "insert excuse here".
Just because you own a Ferrari, doesn't mean you know how to go fast...
Jerry
Must have been a bad tank of gas, or oil in my lane, or crosswinds, or "insert excuse here".
Just because you own a Ferrari, doesn't mean you know how to go fast...
Jerry
You should seriously sit down with Brian Litz's book and read it from cover to cover. There are some pretty fundamental concepts you would do well to learn, and that book will answer questions such as this.
It is all about ballistic coefficients. The amount of powder/energy needed to keep bullets of increasing weights going similar velocities is exponentially higher. Furthermore, to achieve the types of high BC in larger calibers required huge increases in length and weight.
a 30-378 is plain retarded for F-Class competition and offers very little (if anything) over and above a 7mm 180 berger doing 3000 fps in a 284 Shehane or 7 RSAUM
Pathfinder
CGN Ultra frequent flyer
- Location
- Northeast Ontario
If you like the 06 case and the 6.5 bore why not consider a 6.5-06 ?
The difference in wind drift between a 223 and 308 is insignificant. With common loads, they are virtually the same in the wind. Plug some numbers into JBM and see for yourself.
Whoever posted that clearly didn't understand ballistics and was adding a pinch of BS to the story.
jus sayin...
Terry Perkins
CGN frequent flyer
- Location
- Bruce County
bulldog284
CGN Regular
- Location
- pigeon hill
norm
what type of race car are you bringing to the track??you better look out for the super deuce...
what type of race car are you bringing to the track??you better look out for the super deuce...
1000 M race
If you use the 284 Win Case. What is the best caliber 6m, 6.5mm, 7mm, and 30 cal. I'm guessing the 6.5 or 7mm. I belive these two will out perform anything else, in this case. All other things being equal.
If you use the 284 Win Case. What is the best caliber 6m, 6.5mm, 7mm, and 30 cal. I'm guessing the 6.5 or 7mm. I belive these two will out perform anything else, in this case. All other things being equal.
