the .280 Remington

[Polaris]

Gonna give this dead horse one more beating.

.434: advertised BC of .270 160 Partition
.531: advertised BC of 7mm 160 AB

Which one would you rather take a long shot with at a big game animal in a crosswind assuming equal launch velocity (I think the .280 is a bit faster)? I'll take the .280.

If you wanted one rifle for antelope, deer, elk, caribou and moose. It had to shoot flat in the open and drive deep in close or in the woods. I wouldn't fault you if you said 30-06 or one of the 7mm or 30 magnums, but I don't think the 270 fills that bill as well as the .280. The fact that few rifle companies produce .280 rifles simply proves that consumers have poor taste. More versatile, absolutely.

Perhaps the .280 rem is a conniseurs calibre. Stick to your hamburgers, I'll eat prime rib because I can. If nobody makes .280 stuff anymore, I'll make my own out of a pre-64 win md 70 and brass owned by Oconner himself :wink: .

 

[Antelope_Sniper]

Comparing the BC of a semi-spitzer Partition to a AccuBond is not a fair comparison.
Out here, the two main bullets for bigger then deer is the 140gr AB, and the 150gr Partition.
If Nosler made a 150gr AB in .277 it's BC would be just under .5

As for the 175gr Partition in the .280, Those 175's don't like to open up at 7 mag velicities. Last thing I would do is load them at 280 book velocities and expect anything more then a 7mm hole going out of anything I hit with one.

 

[Anonymous]

Comparing the BC of a semi-spitzer Partition to a AccuBond is not a fair comparison.
Out here, the two main bullets for bigger then deer is the 140gr AB, and the 150gr Partition.
If Nosler made a 150gr AB in .277 it's BC would be just under .5

As for the 175gr Partition in the .280, Those 175's don't like to open up at 7 mag velicities. Last thing I would do is load them at 280 book velocities and expect anything more then a 7mm hole going out of anything I hit with one.

Comparing the BC of a semi-spitzer Partition to a AccuBond is not a fair comparison.

YAAAYYYYYYYEEE!!! Antelope Sniper!!!

I was gonna post up something close but, you beat me to it.

Nosler made a 150gr AB in .277 it's BC would be just under .5

which I wouldn't doubt they will make in the near future.

 

[Polaris]

IF they made this bullet. IF they made that bullet. They don't. That's why I had to compare a semi spitzer to an AccuBond. You can only cram so much lead and gilding metal into a .277" bore. The more you cram, the less aerodynamic it gets. Even the 150s are near the top of the limit. Hmmm maybe something with a tungsten core... or gold... or palladium... or DU would get you there.

Keep trying, I'm right, I'm convinced that I'm right, and I'm part Norwegian, part German so good luck changing my mind. :lol:

 

[Anonymous]

those 150 .277 PT's are quite long, but I don't know what would be involved to make a 150 AB.

You're probobly right, the AB doesn't have the room for more lead. You'd have to make the bullet longer, and would require a faster twist.

 

[RiverRider]

that's all I get after all this... you roll your eyes.

Have fun with your 280...

:mrgreen:

Well, yes, that's right. I am here to express my opinions like everyone else and to have thoughtful discussion---not combat and childish derision of others.

 

[Polaris]

This is fun. Please pick on the 6.5 swede, 300 savage, 7.5 Swiss or 7.62X54r next. It's too windy to rake leaves today.

Good day gentlemen.

 

[Anonymous]

relax dude.... it's all fun. SHEEEESE. To be this nitpicky about two caliber is childish.

 

[Antelope_Sniper]

Polaris, I don't know anyone that hunts in open country with the 160gr semi spitzer.
But if the 280 is so versitle, what do you use for a prarrie dog bullet in the .280?

I get 3500 FPS with the 90gr Sierra's out of a 22" barrel, and it will flip the little buggers 10 feet into the air. You MAY gain a little on the high end, but you give it all up on the low end.

 

[RiverRider]

Sierra's got a nice little 100-grain hollow point in 7mm. That was the first bullet I ever managed to shoot a five-shot MOA group with in handloads, in fact. Not that I'd care to make my .280 my primary prairie dog rifle...but it was hell on jackrabbits!

 

[Antelope_Sniper]

Yea...I shot a jackrabbit once with the little Sierra's....it was....."Dynamic" :shock:

 

[Ridgerunner665]

Give up on the low end?

I'd say nothing...

A 100 grain bullet at 3,400 fps (280, average BC........230)....Sierra Varminter
A 90 grain bullet at 3,550 fps (270, average BC........220)...Sierra Varminter

That extra 150 fps the 270 has doesn't last long...the extra BC of the 7mm bullet will run right along with it, and even pass it provided the range is beyond 400 yards....which is a moot point.

The 280 gives up nothing...

 

[Antelope_Sniper]

More like a 350 fps difference if I wanted to push it with modern powders"

Cartridge          : .270 Win. (CIP)
Bullet             : .277, 90, Sierra HP 1800
Useable Case Capaci: 66.462 grain H2O = 4.315 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length      : 26.0 inch = 660.4 mm
Powder             : Alliant Reloder-17

Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.806% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-08.1   89    57.00   3464    2397   46422  10172     97.4    1.106
-07.3   89    57.50   3493    2439   47663  10248     97.7    1.093
-06.5   90    58.00   3523    2480   48936  10322     98.0    1.080
-05.6   91    58.50   3552    2522   50245  10392     98.3    1.067
-04.8   92    59.00   3582    2564   51591  10459     98.6    1.054
-04.0   93    59.50   3611    2606   52973  10523     98.8    1.042
-03.2   93    60.00   3641    2649   54397  10584     99.0    1.030  ! Near Maximum !
-02.4   94    60.50   3670    2692   55859  10641     99.2    1.018  ! Near Maximum !
-01.6   95    61.00   3699    2735   57362  10694     99.4    1.006  ! Near Maximum !
-00.8   96    61.50   3728    2778   58910  10744     99.5    0.994  ! Near Maximum !
+00.0   96    62.00   3757    2821   60502  10791     99.6    0.982  ! Near Maximum !
+00.8   97    62.50   3786    2865   62139  10834     99.8    0.971  !DANGEROUS LOAD-DO NOT USE!
+01.6   98    63.00   3815    2908   63823  10873     99.8    0.960  !DANGEROUS LOAD-DO NOT USE!
+02.4   99    63.50   3844    2952   65557  10908     99.9    0.948  !DANGEROUS LOAD-DO NOT USE!
+03.2  100    64.00   3872    2996   67340  10939    100.0    0.938  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    64.50   3901    3040   69178  10967    100.0    0.927  !DANGEROUS LOAD-DO NOT USE!

With a .1 difference in BC, you would never catch me.

 

[Ridgerunner665]

May not need to catch you...Reloder 17 hasn't shown me much, good speed but terrible accuracy.

The 280 can be pushed past the 3,400 fps mark too....I posted conservative numbers from powders "I" would use.

In the 280 with that bullet...Varget.

In the 270........................Varget.

















In a 243 with a 70 grain bullet.....yep, you guessed it, Varget. :mrgreen:

 

[Anonymous]

RL 17 was developed for short magnums

 

[Ridgerunner665]

RL 17 was developed for short magnums

It is nothing more than Alliants version of the 4350 burn speed...probably a good powder in certain cases, but it doesn't appear to be near as versatile (theres that word again) as either H or IMR 4350.

 

[Oldtrader3]

If you are going to shoot 160 Accubonds and want 3000 fps, use IMR 7828 SSC. It worked for me.

 

[Antelope_Sniper]

The academic difference is the .277 can effectively use a a 10% lighter bullet, and the .284 can effectivly use a .06% heavier bullet.
As for load, what I quotes was from a load I used 25 years ago, before I had a dedicated varmit rifle(s).
Truth of the matter is both you and I have varmit rifles, and bigger rifles for Elk and Moose, and our .277/.284 rifles of .06 case size are what we pick up when heading out for deer or antelope. In that arena the differences are essentially nil.

130-150gr BT at 3K+ = dead deer. .277,or .284 doesn't really change the equation......dead deer.

 

[Ridgerunner665]

The "06 size rounds in my bunch are...270 (my wifes), 280 AI (mine...shot out), 30-06 (my deer, elk, whatever rifle).

For varmints...I've tried everything from .222 to 25-06...I believe the 243 Win. to be the best of the bunch.

P.S. Yeah...I know...I need to get some rebarreling done.

 

[Wincheringen]

Here's a little humor for you guys.