.270 Caliber. Why?

[sage5907]

Back in the 1950's when the 270 Winchester came to be so popular it was one of two cartridges that were chambered for the Model 70 rifle that took the shooting world by storm. Jack O'Connor may have touted the 270 Winchester but it was the shooting public that recognized the excellent fit of the Model 70 chambered for the 270 and the 30-06. Of the 581,471 Model 70 rifles that were sold by the end of 1963 a full 57 percent of them were chambered for 270 Winchester and 30-06 cartridges. 122,323 were 270 Winchester and 208,218 were 30-06's. The Model 70 was the custom rifle of the day and could be handled and purchased in most hardware stores. Attached is a picture of a pair of 270 Winchester rifles manufactured in 1953 and I have carried them to take several large whitetail and mule deer.

 

[Lone Star]

The .280 Remington is deliberately factory loaded lighter than the .270 to make it usable in their auto and pump rifles. The handloader can load the .280 as hot as the .270, and in fact, Jack O'Connor had a custom .280 and liked it. But it wouldn't do anything that his beloved .270's wouldn't.

On the other hand, it wouldn't do less, and it can be loaded with 175 grain bullets for larger game. That's seldom noted in print.

 

[R.W.Dale]

The .280 Remington is deliberately factory loaded lighter than the .270 to make it usable in their auto and pump rifles. The handloader can load the .280 as hot as the .270, and in fact, Jack O'Connor had a custom .280 and liked it. But it wouldn't do anything that his beloved .270's wouldn't.



On the other hand, it wouldn't do less, and it can be loaded with 175 grain bullets for larger game. That's seldom noted in print.

The problem with this assessment is Remington chambered the rifles in question for 270 Winchester from the get go

 

[stiab]

The problem with this assessment is Remington chambered the rifles in question for 270 Winchester from the get go

Those Remington pumps and semi-autos chambered in .280 sell for a significant premium over the same guns in .270.

 

[R.W.Dale]

Those Remington pumps and semi-autos chambered in .280 sell for a significant premium over the same guns in .270.

Just because of the scarcity. Just like with 300 savage or 35rem

 

[ants]

Why .277" ?

0.277" is exactly 10% smaller than 0.308".

0.270" is exactly 10% smaller than .300".

0.308 x .90 = 0.2772
0.300 x .90 = 0.2700



Perhaps they simply made the .270 cartridge exactly 10% smaller than the 30 caliber cartridges.





No, 7mm is not exactly .277. There are 25.4 millimeters per inch, so each millimeter is 0.03937 inches. Multiply times 7 and you get 0.27556 inches.

 

[Cocked & Locked]

Perhaps they made the .270 cartridge just because they wanted to.

 

[stiab]

Just because of the scarcity. Just like with 300 savage or 35rem

Yeah, that's what I meant. Except the .280 still is at a premium over many of the .300 Savage and .35 Rem (pumps only), because the .280 will be factory D&T for scope, none of the .300 Savage are, and only a few of the .35 Rem 760's are.

 

[H&Hhunter]

Not sure of the why. But seeing that they've sold about 12 godrillion rifles chambered in it I'd say it was a good idea.

 

[justin22885]

that 270 is one hot (and i mean in terms of it being 65kpsi) cartridge.. with some of the higher BC bullets hornady is putting out for the 6.8SPC, such as the 120 grain SST with a BC of .400, im kind of curious as to how flat shooting that bullet would be coming out of a 270?.. my guess would be around 3,300fps... that would be one heck of a flat shooting cartridge

wonder why you rarely see 308, 30-06, or any other long action cartridges loaded that hot?

 

[TGReaper]

.270 / 7mm

When the .270 came out there was a bad taste in north AM over the metric system. So they did the next best thing, they made a 7 mm.
.270 > 7 mm. 7 mm (as in 7x57) > .284
TGR

 

[jgh4445]

DR T was right. It was the .280 Remington first, the the 7mm Rem express, then back to the .280.