6.5 Needmoor ~ Federal +Peak

remington jim said:
Something no one has talked about there is no Gaurantee that any of the 5 Plus Peak ammo will shoot accurately in yiour rifle 🤷‍♂️
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My take on this steel case high pressure stuff is that accuracy seems to be worse then that of conventional lower pressure ammo. That is not based on true data though, that is based on the reviews I've seen.

My train of thought is if you want the extra speed for long range hunting and you are sacrificing accuracy, it might not actually extend your effective range on game with most cartridges, which is why I don't really see this working out long term as it stands. Maybe if you are limited by energy, not minimum expansion velocity?
 
KodiakHntr said:
Proof has a new barrel - starts out at a 1:500” twist and accelerates to 1:7” that basically eliminates throat wear for all practical purposes. Tested against a standard tube in 7BC, they completely cooked a regular tube at 2500 rounds, and the new barrel with the straight rifling to start is over 5000 rounds and still shooting sub inch 10 shot groups.
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This is quite interesting.
 
KodiakHntr said:
Proof has a new barrel - starts out at a 1:500” twist and accelerates to 1:7” that basically eliminates throat wear for all practical purposes. Tested against a standard tube in 7BC, they completely cooked a regular tube at 2500 rounds, and the new barrel with the straight rifling to start is over 5000 rounds and still shooting sub inch 10 shot groups.

The technology is changing fast, and new developments are definitely intriguing.
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That is an interesting concept but 99.999% of all 6.5 CM's that are out there being shot now do not have these barrels so how they will fare with this new peak ammo remains to be seen. Personally I don't have one so I'm just an interested bystander watching it unfold.
 
MiG25 said:
A 6.5mm with progressive twist barrels, welcome to the 1890's.
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Brilliant!!! Around 130year old military engineering!
1890s, you are referencing the iconic 6.5Ă—52mm Carcano and the 6.5Ă—50mmSR Arisaka technology.

Progressive twist barrels were completely abandoned by world militaries because they were incredibly expensive, highly inefficient to mass-produce, and totally unnecessary with modern materials.

 
adamthebad said:
Brilliant!!! Around 130year old military engineering!
1890s, you are referencing the iconic 6.5Ă—52mm Carcano and the 6.5Ă—50mmSR Arisaka technology.

Progressive twist barrels were completely abandoned by world militaries because they were incredibly expensive, highly inefficient to mass-produce, and totally unnecessary with modern materials.

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Shucks, it’s too bad that barrel manufacturing and steels haven’t kept pace with technology improvements the same way that cartridge case technology has……………………………….
 
KodiakHntr said:
Shucks, it’s too bad that barrel manufacturing and steels haven’t kept pace with technology improvements the same way that cartridge case technology has……………………………….
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depends...
when blind to the fact that barrel manufacturing has advanced massively with technologies like vacuum arc remelting, cryogenic stress-relieving, and precision button rifling. The problem isn't that steel technology hasn't kept pace—the problem is that no standard commercial gun steel on earth can bypass the basic laws of physics and fluid dynamics.

because a manufacturer puts a fancy name on a barrel, it creates a magical safety shield that can ignore extreme 80,000 PSI gas expansion and structural mechanical limits.

Just because a manufacturer puts a fancy schmacy name on a barrel, it creates a magical safety shield that can ignore extreme 80,000 PSI gas expansion and structural mechanical limits...

just depends

 
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adamthebad said:
depends...
when blind to the fact that barrel manufacturing has advanced massively with technologies like vacuum arc remelting, cryogenic stress-relieving, and precision button rifling. The problem isn't that steel technology hasn't kept pace—the problem is that no standard commercial gun steel on earth can bypass the basic laws of physics and fluid dynamics.

because a manufacturer puts a fancy name on a barrel, it creates a magical safety shield that can ignore extreme 80,000 PSI gas expansion and structural mechanical limits.

Just because a manufacturer puts a fancy schmacy name on a barrel, it creates a magical safety shield that can ignore extreme 80,000 PSI gas expansion and structural mechanical limits...

just depends

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You know, I have a coworker that runs all his email replies through AI before he sends them. Sometimes he gets in a rush and misses some of the cut and paste text in them before he sends them and they end up with duplicate sentences or paragraphs in a different font. Odd stuff.

Anyway, the point I was making previously is that a bunch of the complaints about this new hotrod ammo is that it would burn barrels out faster. Low and behold, barrel companies are working on technology that mitigates that issue. It’s like the entire industry is advancing its technology!
 
KodiakHntr said:
You know, I have a coworker that runs all his email replies through AI before he sends them. Sometimes he gets in a rush and misses some of the cut and paste text in them before he sends them and they end up with duplicate sentences or paragraphs in a different font. Odd stuff.

Anyway, the point I was making previously is that a bunch of the complaints about this new hotrod ammo is that it would burn barrels out faster. Low and behold, barrel companies are working on technology that mitigates that issue. It’s like the entire industry
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maybe your pal has a problem with words???

as for the latter part
THERMAL and ACTIONS .
 
KodiakHntr said:
Latest Outdoor Life podcast has John Snow on it talking about this.
Interesting to listen to, in that it sounds like Federal has worked out the kinks with reloading the steel case now for the 6.5 CM that they ran into with the 7BC. Apparently will be data released for reloaders with commonly available powders now for the 6.5CM. Area419, SAC, and RCBS are working on making dies available.

And there was some interesting dialogue around what actually wears out throats. Friction from the bullet engaging the lands, not the heat from ignition. Proof has a new barrel - starts out at a 1:500” twist and accelerates to 1:7” that basically eliminates throat wear for all practical purposes. Tested against a standard tube in 7BC, they completely cooked a regular tube at 2500 rounds, and the new barrel with the straight rifling to start is over 5000 rounds and still shooting sub inch 10 shot groups.

The technology is changing fast, and new developments are definitely intriguing.
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I don't know where this information came from, but going from 1:5 to 1:7 is slowing down, not accelerating ie; 1:5 is 1 revolution every 5", 1:7 is 1 revolution every 7"
 
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