Tis the Season! (For the annual new cartridge....)

[shb]

What's rpm?

Rebated precision magnum

 

[shb]

Rebated precision magnum

Thank you

 

[shb]

Thank you

No - thank google.

 

[Kimber7man]

Disagree. 22 creedmoor is already a hot rod, not much more juice to squeeze out of that option. They already have a 240 wby that’s a laser and offered with 7.5 twist. Plus, lots of weatherby fudds probably don’t think 6mm are big enough for men to hunt big game with.

There are zero fast quarterbores tailored to the new high bc pills which IMO are a better balance of weight and BC than the 6.5 140 class bullets.

They seem about the same to me, comparing the 257 133 elite hunter vs the 6.5 140 elite hunter

Bullet Weight	133 Grain
G1 BC	0.613
G7 BC	0.315
G7 Form Factor	0.914
Minimum Twist (or faster)	1:8"

Bullet Weight	140 Grain
G1 BC	0.606
G7 BC	0.31
G7 Form Factor	0.926
Minimum Twist (or faster)	1:8"

 

[Wind Gypsy]

They seem about the same to me, comparing the 257 133 elite hunter vs the 6.5 140 elite hunter

Bullet Weight	133 Grain
G1 BC	0.613
G7 BC	0.315
G7 Form Factor	0.914
Minimum Twist (or faster)	1:8"

Bullet Weight	140 Grain
G1 BC	0.606
G7 BC	0.31
G7 Form Factor	0.926
Minimum Twist (or faster)	1:8"

Yeah, you're right.

I tend to think of the 131 ACE/SMK and 135 LRHT a lot when generalizing on these things. That 131 SMK is a monster for BC/velocity potential but wouldn't be a first choice for hunting due to terminal performance although lots of people have used them with success.

But the 133 EH and 140 EH are basically the same from a BC standpoint. 140 ELDM and 134 ELDm are rated similarly by Hornady but I've gotten the impression that the 140 might be a bit inflated.

In general, even if they are the same BC, should be able to push the 25s a hair faster in the same case and with a hair less recoil. Real close so not in a hurry to move on from my 6.5s

 

[Hammsolo]

What's rpm?

It’s an ancient Latin term for hype.

 

[Hammsolo]

Rebated precision magnum

What’s the discount?

 

[Hammsolo]

In the words of one of my students, “I have to keep it real.” We’ve hit the point where the primary purpose of cartridge development is rifle sales. Yes, engineers search for ANY advancement, but we may be at the point of this being statistically insignificant. I haven’t had enough coffee to crunch the numbers this morning.

 

[Sheltowee]

In the words of one of my students, “I have to keep it real.” We’ve hit the point where the primary purpose of cartridge development is rifle sales. Yes, engineers search for ANY advancement, but we may be at the point of this being statistically insignificant. I haven’t had enough coffee to crunch the numbers this morning.

Sales has kind of been the purpose of new cartridges ever since Oliver Winchester crammed a .44-40 into an 1866 Yellowboy, though. I agree that we have hit something close to a performance plateau with standard components and are seeing mostly only incremental benefits over existing cartridges. You can only hit so much pressure within existing parameters.

That being said, the new NAS3 cases might be the next jump forward in cartridge design: https://shellshocktechnologies.com/technology/. Do we need the ability to push a 5.56 round to 85k PSI? Probably not. Will it sell like hotcakes to a certain audience? Absolutely.

Of course, all of these were things probably said by the first Spanish pikeman being told to give up his pointy stick for one of them damn new-fangled arquebuses ca. 1500.