When does 6.5 = 6.7

[carswellb58]

I've ordered a new rifle and it's being built now. and I decided to select a 6.5-284 Norma. While it's being built I've begun acquiring dies, powder, brass and bullets.

It may be a bit late for me to make this discovery, but 6.5 bullets are 6.7 mm in diameter. It seems odd to me to call it 6.5 when it measures 6.7. Can someone explain?

I don't guess it makes that much difference, since it's just a name, but seems odd to me. Am I overlooking something?

 

[Frank in the Laurels]

All 6.5 bullets are .264 inches in diameter, next up the line are the .270 group which are .277 in diameter... Maybe someone just rounded the .264 up to .270...I don't think I ever saw anything ever marked .270 cal anywhere....take a picture of the label or tell us what company to look under ??

 

[FEENIX]

You need to change your rifle order to 6.7-.284 quickly. gun)





Welcome to LRH and enjoy!

 

[Sully2]

You need to change your rifle order to 6.7-.284 quickly. gun)

Welcome to LRH and enjoy!

YOU would do that to somebody.....wouldnt you!

 

[Mikecr]

Bore -vs- Groove, .257 -vs- .264
And you're right, it makes no sense, along with many other ballistic contradictions..

It also makes no sense that we would have to choose from ~800 different spark plugs, ~300 different oil filters, and that Dodge rims don't fit Chevy.

 

[FEENIX]

YOU would do that to somebody.....wouldnt you!

lightbulbOf course not, that's why I used all the applicable emoticons. lightbulb

 

[MagnumManiac]

6.5mm relates to bore size, not bullet diameter, simple as that.

 

[RockyMtnMT]

6.5mm relates to bore size, not bullet diameter, simple as that.

Yep

Steve

 

[Mikecr]

Well, until you get into Lazzeroni cartridges..
And if I remember right, he's technically correct.

 

[FEENIX]

Lazzeroni has a better (closer) application/use of MM to inch conversion of their proprietary cartridges ...

6.53 (.257) Scramjet
7.21 (.284) Firebird
7.82 (.308) Warbird
8.59 (.338) Titan
9.53 (.375) Saturn
10.57 (.416) Meteor

 

[Sully2]

Lazzeroni has a better (closer) application/use of MM to inch conversion of their proprietary cartridges ...

6.53 (.257) Scramjet
7.21 (.284) Firebird
7.82 (.308) Warbird
8.59 (.338) Titan
9.53 (.375) Saturn
10.57 (.416) Meteor

Give them all metric calibers and then name them some silly assed name....geeze!..

 

[tbrice23]

I've ordered a new rifle and it's being built now. and I decided to select a 6.5-284 Norma. While it's being built I've begun acquiring dies, powder, brass and bullets.

It may be a bit late for me to make this discovery, but 6.5 bullets are 6.7 mm in diameter. It seems odd to me to call it 6.5 when it measures 6.7. Can someone explain?

I don't guess it makes that much difference, since it's just a name, but seems odd to me. Am I overlooking something?

I need to sell my 6.7-284 Redding dies and Lapua 6.7-284 brass if your looking?