Russia on brink of ... NOPE! Russia INVADES Ukraine!

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Leeea

Diamond Member
Apr 3, 2020
3,697
5,431
136
I dont understand how 5.56 has higher chamber pressures but .223 supposedly has higher velocities at every stage of the ballistic trajectory. Also 5.56 has flatter trajectory and less drop with same weight and slower velocity? Does not compute. Like at all.
random speculation, not an expert here:

Speed of which the powder burns, more gunpowder burning slower yields more velocity for the .223 with less chamber pressure.

NATO 5.56: boat tail nature of the 5.56 round results in better ballistics, steel tip under the FMJ puts the weight farther back in the bullet. Powder burns quicker to retain more velocity when fired from short barreled weapon.


When sold in the US, there are frequent warnings not to put NATO 5.56 in a .223 rifle.
The biggest difference seems to be in the head spacing and the forcing cone. Head spacing is how the shoulder of the bullet sits against the head of the barrel. Forcing cone is the cone that the squeezes the bullet into the threads of the rifling as it goes into the barrel. The full metal jacket part of the NATO round is slightly larger and harder then what .223 was designed for. When the NATO round is put into a .223 chamber, the pressures generated to force bullet into the groves is far in excess of the original specification of the .223 round.
 
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gorobei

Diamond Member
Jan 7, 2007
3,713
1,067
136
Hey! Don't give the anti-pun posters any more ammo. It makes me feel like a target!

What is it with all these libruls pushing their so called "common sense" pun control?

They can try to pry my puns from my cold dead . . . brain?
i will not ogive in to your puns, expect much blowback and a bottlenecking of your cyclic rate.
 
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K1052

Elite Member
Aug 21, 2003
46,850
34,790
136
Germany agrees to sell Ukraine up to 100 units of the Boxer RCH made by KMW. This is the PzH2000's gun on a wheeled platform which is a good deal more mobile, faster, and requires less crew than the tracked PzH. Ukraine had been considering buying the PzH2000 but seems to have changed their minds. Germany had not previously agreed even to sell heavy weapons to Ukraine while the war was so hot but the delivery timeline is 2025. Hopefully a contract for Leopard 2s isn't far behind.

Edit: Just realized after looking a bit this order is actually in addition to the 100 PzH2000s that Ukraine ordered.

Including the Krabs ordered from Poland this would entirely replace their pre-war 152mm SPH inventory. I think it's unlikely they'll want to operate more than two or three different (self propelled) guns in the same caliber long term. Some of what they've gotten is on loan like the CEASARs but they'd probably refit and store the M109s , ZUZANAs, etc etc as wartime reserve.

 
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Dave_5k

Golden Member
May 23, 2017
1,659
3,214
136
Russia should've stuck with information warfare, they've done far more damaged funding internet trolls then they could ever do on the battlefield.
Also, given their cyber extortion division, they actually make a profit as well... unlike the battlefield
 
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WelshBloke

Lifer
Jan 12, 2005
30,967
8,688
136
Hey! Don't give the anti-pun posters any more ammo. It makes me feel like a target!

What is it with all these libruls pushing their so called "common sense" pun control?

They can try to pry my puns from my cold dead . . . brain?
Audibly groaned at "pun control" to the extent that I had to explain these forums to my wife!
 
Reactions: Leeea

rommelrommel

Diamond Member
Dec 7, 2002
4,389
3,120
146
random speculation, not an expert here:

Speed of which the powder burns, more gunpowder burning slower yields more velocity for the .223 with less chamber pressure.

NATO 5.56: boat tail nature of the 5.56 round results in better ballistics, steel tip under the FMJ puts the weight farther back in the bullet. Powder burns quicker to retain more velocity when fired from short barreled weapon.


When sold in the US, there are frequent warnings not to put NATO 5.56 in a .223 rifle.
The biggest difference seems to be in the head spacing and the forcing cone. Head spacing is how the shoulder of the bullet sits against the head of the barrel. Forcing cone is the cone that the squeezes the bullet into the threads of the rifling as it goes into the barrel. The full metal jacket part of the NATO round is slightly larger and harder then what .223 was designed for. When the NATO round is put into a .223 chamber, the pressures generated to force bullet into the groves is far in excess of the original specification of the .223 round.

We could and maybe should have a different thread for this. 5.56 is (generally) loaded a bit hotter. There are 223 spec equivalents of some 5.56 loads and they have a bit less velocity. Almost all 223 and 5.56 loads are boat tail. 5.56 when compared bullet to bullet gets a bit better ballistics just from being a bit faster. The thickness of the metal jacket is irrelevant, even solid copper bullets can be fired safely. The chamber pressure between a 223 and a 5.56 is very similar, well within a safe variation in most rifles.

And you can add to that, most 223 marked semi autos are not actually cut with a 223 chamber, but with a 5.56 chamber. They are marked 223 for legal reasons, some for export, some for import. Some countries don't allow "military calibers" like 5.56, but civilian 223 is safe of course.

5.56 will not blow up a 223 gun, in most cases it will be fine, some it will be hard on the gun, and in some rare cases it may be overpressure enough to back out primers, pierce primers, cause sticky ejection, etc.
 
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WelshBloke

Lifer
Jan 12, 2005
30,967
8,688
136
We could and maybe should have a different thread for this. 5.56 is (generally) loaded a bit hotter. There are 223 spec equivalents of some 5.56 loads and they have a bit less velocity. Almost all 223 and 5.56 loads are boat tail. 5.56 when compared bullet to bullet gets a bit better ballistics just from being a bit faster. The thickness of the metal jacket is irrelevant, even solid copper bullets can be fired safely. The chamber pressure between a 223 and a 5.56 is very similar, well within a safe variation in most rifles.

And you can add to that, most 223 marked semi autos are not actually cut with a 223 chamber, but with a 5.56 chamber. They are marked 223 for legal reasons, some for export, some for import. Some countries don't allow "military calibers" like 5.56, but civilian 223 is safe of course.

5.56 will not blow up a 223 gun, in most cases it will be fine, some it will be hard on the gun, and in some rare cases it may be overpressure enough to back out primers, pierce primers, cause sticky ejection, etc.
There were numbers and words but... yeah...
 

DaaQ

Golden Member
Dec 8, 2018
1,360
971
136
Would someone please list the bullet points on this controversy?
random speculation, not an expert here:

Speed of which the powder burns, more gunpowder burning slower yields more velocity for the .223 with less chamber pressure.

NATO 5.56: boat tail nature of the 5.56 round results in better ballistics, steel tip under the FMJ puts the weight farther back in the bullet. Powder burns quicker to retain more velocity when fired from short barreled weapon.


When sold in the US, there are frequent warnings not to put NATO 5.56 in a .223 rifle.
The biggest difference seems to be in the head spacing and the forcing cone. Head spacing is how the shoulder of the bullet sits against the head of the barrel. Forcing cone is the cone that the squeezes the bullet into the threads of the rifling as it goes into the barrel. The full metal jacket part of the NATO round is slightly larger and harder then what .223 was designed for. When the NATO round is put into a .223 chamber, the pressures generated to force bullet into the groves is far in excess of the original specification of the .223 round.
We could and maybe should have a different thread for this. 5.56 is (generally) loaded a bit hotter. There are 223 spec equivalents of some 5.56 loads and they have a bit less velocity. Almost all 223 and 5.56 loads are boat tail. 5.56 when compared bullet to bullet gets a bit better ballistics just from being a bit faster. The thickness of the metal jacket is irrelevant, even solid copper bullets can be fired safely. The chamber pressure between a 223 and a 5.56 is very similar, well within a safe variation in most rifles.

And you can add to that, most 223 marked semi autos are not actually cut with a 223 chamber, but with a 5.56 chamber. They are marked 223 for legal reasons, some for export, some for import. Some countries don't allow "military calibers" like 5.56, but civilian 223 is safe of course.

5.56 will not blow up a 223 gun, in most cases it will be fine, some it will be hard on the gun, and in some rare cases it may be overpressure enough to back out primers, pierce primers, cause sticky ejection, etc.
Will do, sorry for the off topic.


Made a thread in OT, thanks.
 
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Michael

Elite member
Nov 19, 1999
5,435
234
106
After a week of smashing gains, not as much news from the front. Russia is still grinding out small gains in the East, so even with the losses they are still attacking. Down South still all positional warfare.

I guess, until suddenly it isn’t again.
 

K1052

Elite Member
Aug 21, 2003
46,850
34,790
136
After a week of smashing gains, not as much news from the front. Russia is still grinding out small gains in the East, so even with the losses they are still attacking. Down South still all positional warfare.

I guess, until suddenly it isn’t again.

AFU crossed the Oskil and are surrounding Lyman. Russian prospects for taking Donetsk let alone holding Luhansk look very very poor.
 

Michael

Elite member
Nov 19, 1999
5,435
234
106
Lyman has been attacked for days now, the Russians have dug in and are defending. Not saying that something will not suddenly break but after the the rout, the UA forces moved into regions better defended and between consolidating gains and meeting stiff resistance they stalled out again.

And Russian forces are still attacking and making slow, grinding progress on that front with artillery support.
 
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