.260, .243 and .25-06

[Cold_Bore_88]

I know a lot of competition shooters use the .260 Remington and .243 Winchester. But why use that's over a .25-06? The .260 is a 6.7 mm with the .25-06 being a 6.5 mm with more powder. I am new too the 6-7 mm world. I have always owned .30 calibers mainly because of the stopping power when you use a good hunting bullet.

 

[buffybuster]

Probably the biggest obstacle to the .257cal bore is the near total absence of high BC match bullets.......

Been bugging Berger for YEARS to make one..... Still waiting......

 

[DirtyDave]

Not exactly. Bullets are not always "called" or "named" after their true dia. There are not as many good target bullet options for the 25-06 (.257" bullet). The 1/4" stuff (.257") is not the same as the 6.5mm bullets. "6.5mm" bullets are .264"

 

[redneckbmxer24]

Probably the biggest obstacle to the .257cal bore is the near total absence of high BC match bullets.......

Been bugging Berger for YEARS to make one..... Still waiting......

This. Berger makes one .257 bullet but the BC is nothing great and unfortunately is one of the better choices. 6mm and 6.5mm is superior for the bullet options along.

OP, this is a niche market and with all the choices out there now I doubt you'll see much else for a while. Any time a manufacturer makes a new bullet there is a bunch of research and development which costs money. With the lack of demand for .257 because of other great choices there is no guarantee for the company to make money.

 

[buffybuster]

There is some misunderstanding between US "inch" caliber nomenclature and European "metric" caliber nomenclature.

US "inch" nomenclature generally refers to the GROOVE diameter of the barrel. 0.308" is the groove diameter = 7.82mm

European "metric" nomenclature generally refers to the LAND diameter of the barrel. 7.62mm is the land diameter = 0.300"

Now there are some cartridges and manufactures that are exceptions (Lazzaroni comes to mind).

 

[Cold_Bore_88]

Not exactly. Bullets are not always "called" or "named" after their true dia. There are not as many good target bullet options for the 25-06 (.257" bullet). The 1/4" stuff (.257") is not the same as the 6.5mm bullets. "6.5mm" bullets are .264"

Thanks for the help. Just a thought I had. I always found it interesting that a 6.5 was actually closer to 6.7 mm and a .257 was a true 6.5 mm bullet.