About a year ago I heard that Nosler or Berger were releasing a new bullet for the 270 Winchester that puts the 270 in the class of the long range 6.5 Creedmor but I've heard nothing since.
Any 270 reloaders heard this?
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About a year ago I heard that Nosler or Berger were releasing a new bullet for the 270 Winchester that puts the 270 in the class of the long range 6.5 Creedmor but I've heard nothing since.
Any 270 reloaders heard this?
Nosler has come out with several L/R AccuBonds to include the .270 with a BC of .625. I doubt the Creedmore part has anything to do with a 6.5 projectile since there are so many variations out there. The Nosler .270 AccuBond does give the .270 good range capabilities and I own .270's and load for them. However, the 6.5 bullet still has better B/C's, Lapua 123 is 527 and the 139 is over 600 as is a Berger. If you use a 6.5-06, 6.5 RSAUM or 6.5 WSM or 6.5x.284 they will kick the .270 to sleep. I do not doubt that with a bit of work you can make a .270 do well with the AccBond, but that is about it for L/R pills for the .270.
These are what you heard about:
http://www.nosler.com/accubond-long-range/
I bought some of the 270 caliber 150 grain Nosler Accubond long range bullets and may use them on an elk/deer hunt this year. The accuracy has been ok, but not great; about 3/4"-1" at 100 yards. If you are shooting a savage 270 wsm, make sure it is a newer model that has the 1-10" twist. The older ones have a 1-11" twist and will not stablize the longer 150 grain bullet. I am at 4200 feet elevation and the 1-10" twist stablizes the bullet.
http://www.midwayusa.com/product/440...ail-box-of-100
http://i.imgur.com/whIkb.jpg
Also don't believe the b.c. numbers either they are highly over estimated and inflated. You can expect a b.c. to fall closely to the berger of the same weight.
velocity dictates actual bc of a bullet. bullet makers should indicate the velocity required to achieve the advertised number.
some custom makers dont advertise bc due to that.
G1 BC is very velocity dependent G7s are less so since the bullet shape closely matches the G7 form factor. Nosler does there testing at high velocity over a very short range 100 yards which results in much higher BC than bullet makers that test different velocity ranges or over longer distances. BC for any bullet can be easily estimated to within 5% or less using simple formulas and math, despite this Nosler insists on providing inflated numbers to the public for the sole purpose of increased sales to the general public.
stomp442 has it. Seirra's site shows b/c's in relation to velocity.
Running some quick numbers I'm coming up with a G7 BC for the 150ALR right around the .270 mark and G1s around .535, more than 100 points difference on the G1 side and close to 50 on the G7 side. The Noslers are going to be a great long range option especially for those that like the bonded bullet style of performance but they are not going to offer the ballistic performance that they advertise.
Why is the 6.5 swede and creed able to achieve long range match accuracy out to 1000 yds yet the 270 is similarly close in caliber but not generally used for long range match shooting? The 270 does have the rep of being fast and flat shooting but yet the 6.5 gets all the glory.
Its all in the b.c. put a 6.5 140 next to a 270 140 and you will have all the answers you need. The 6.5 is longer and sleeker and is able to hold energy,velocity and better wind drift down range. When it comes to match shooting its all about minimizing the wind and the 6.5 does this nicely.
Why are the new 270 Accubonds still lacking in BC compared to the 6.5? Is it chamber length? Something is stopping Nosler and Berger from making a really long sleek 270 round that blows away the 6.5.Quote:
Originally Posted by stomp442
Stomp I notice you are in Arizona. You must have a hundred places you can shoot 1000 yds. In SC 300 yds is a rarity.
The longer the bullet the faster the twist rate has to be.......most 270 are 11 or 10 twist. Which limits the length of the bullet it can handle at normal velocities.
BC is dependent on velocity, shape, weight and length of the bullet.......and how truthful the bullet manufacturer is.
You'll find most high BC bullets will require a fast twist barrel.
Thanks Apache. Would a BC of .4 or even .300 be more at home in the 270?
Perhaps it's a waste to use the long boat tails in a 10 twist since they can't stabilize from a 10 twist? Maybe it is even counter productive to sell 270 ammo with a BC of .500? I'm trying to understand the 270.
The 270 is a great round it really is and the new accubond isn't lacking at all it has exceptional b.c. for a 270. For a hunting rig the 270 is really really hard to beat as far as an all around performer. But when it comes to match shooting there are other calibers that are better suited to buck the wind and are more forgiving when it comes to scoring points. With practice I'm sure the 270 could do well in match shooting, its all about how well the shooter knows his rifle and how the wind effects the bullet.
I have read in the past that berger was developing a truly long range bullet for the 270 in the 160gr range. Problem is its going to require a custom barrel to shoot it and preferably something with a little more horse power like the 270wsm to really maximize its potential. From what I understand the bullet is still in development and put on the back burner due to the shortage and demand of the current market.
If 300 yards is a rarity why are you so concerned with the B.C of the 270? Load a 130 Berger or Sierra game king and go hunting. 300 yards isn't enough distance to really benefit from a higher b.c.Quote:
Originally Posted by Mach2
I can go to Ft Jackson for long range.Quote:
Originally Posted by stomp442