Home Forums Hunting & Shooting Hunting Rifles 280AI vs 270 Winchester

Pretty much it....

I'm a .270 fanboy as well, I'd just buy the rifle you want in .270 Win. I'm thinking of ordering a 1:8 twist barrel for my next .270 Win. I killed my biggest mule deer just shy of 600 yards with the .270 and 130 grain SGK, I doubt the .280 AI would have worked better.

TF1 mentioned it... twist rate for factory .270 Win rifles is slow, which limits high BC bullets due to their length. There are some .277 bullets with high-ish BC values, but be careful as factory barrels may not fully stabilize them.

For example, JBM lists the 145 ELD-X at 1.367". Using that value in the Berger twist calculator, along with 2970 fps (advertised by Horny for Precision Hunter ammo), 1-in-10 twist, and ambient temp of 25 degrees F, you'd need to be hunting at 6000+ feet of elevation for full stability.

Whether full stability matters or not, is up to the individual but it can affect the actual BC. Of course, you can correct for it based on your environment but varying BC is a pain for some and a non-issue for others depending on where they hunt.

How good are you at splitting hairs?

I always find it interesting that the 280 crowd likes to run the 280AI up against the 270 and not the standard 280. They're just fortunate that the 270 AI ain't a thing.

+2 ...

Lilja will turn a 1:8" twist barrel with .277" diameter. Have one on a rifle. And have some 150gr TSX and 180gr Woodleighs on hand. But, have not made time to play.

Might as well discuss the difference between the .280 Remington, 7mm-06 and 7mm Express.

The .280 is clearly the superior choice of the three as it is the easiest to find ammo for.

Depends, are you James Bond....

If so you may need .007" extra diameter, otherwise there ain't enough difference to make a difference. Better selection of .284" bullets, better selection of .270WCF ammo and you can buy it just about anywhere.

If I didn't have either and was choosing one or the other I'd go with the .280 for the better bullet selection.

Someone please explain what "better" bullet selection means?

ELDX = ELDX

Berger = Berger

Corlokt = Corlokt

TTSX = TTSX

Partition = Partition



No?

You need it explained?

It has to do with both size and BC. For example if you think you need a stout, heavier bullet for big animals the biggest Partition you can shoot in your .270 is 160 grains; the biggest for the .280 is 175 grains. The heaviest TTSX Barnes lists for the .270 is 130 grains; for the .280 it's 150.

For Berger bullets the highest BC you can get in .270 is .662, for the .280 it's .755.

And so on and so forth.

7mm Express and .280 Remington are the same cartridge, the Express was Remington's failed attempt to pump new life into the overlooked .280. It caused lots of confusion as some hunters thought that the Express and 7mm Remington Magnum were the same. Firing an express cartridge in a rifle chambered for the Magnum resulted in a ruptured case and in many instances a damaged rifle. This came about during the time I was working in the Browning Arms Co. gunsmithing shop, I repaired several magnum BAR rifles that had fired Express ammo. I still have the ruptured cases that I removed from those rifles, they are split lengthwise for nearly the entire length and the head was really welded into the bolt face especially the ejector hole.

You must have missed the little smiley face at the end of his post.....

Sure, if a guy is chasing BC. But a 140 gr .277 NAB beats a 140 gr. 284 NAB in that department.

Both still Accubombs.

Not only BC, size and weight, like I said. Try shooting a 160 grain Accubond in a .270.

You asked, I answered. Next question?

Very few people ever shoot 175 and 160 grains bullets in their 280's or 270's. To suggest there is much real world difference between the two cartridges is really pole vaulting over mice turds.

Run the 277 140 NAB vs the 280AI 160 AB and see what all the fuss is....

In a .280 you can shoot:

1) Heavier bullets; and

2) Bullets with higher ballistic coefficients.

Period.


There now, could you understand it that time?

If a frog had wings he wouldn't bump his ass when he hopped.

Understand?


How much money have you dumped into your 280AI just to see you ain't reinvented the wheel?

Understand?