JW-105 question

Panic

Panic

CGN Regular
Location
Burnaby, BC
Hi,

Would you happen to know if this rifle is safe to use 5.56 Nato surplus rounds? I've found conflicting comments while researching the calibre and rifle and thought maybe you might have that information as a dealer.

Many thanks in advance,

Sean (panic)
 
I've not purchased it yet...but have seen the JW-105-t offered on the Marstar site and I'm very very tempted, but there's a difference between .223 REM and 5.56 Nato in the amount of pressure.

IF it's chambered in 5.56x45 Nato then there's no problem (apparently) and it will easily handle .223 ReM as its a lower pressure round. If it's .223 ReM chambered then it can't handle the military grade Nato 5.56 and it can damage the rifle (apparently).

As the importer I'm just hoping Marstar has the relevant information on chamber pressures. Something about a SAMI pressure difference??
 
GUYS, here is the RUNDOWN ON .223 vs 5.56 nato.
1) The brass on 5.56 can be and usually is slightly thicker. This is to safely contain the pressures that can be found using a 5.56 nato chamber.
2) There is more than TWICE the amount of freebore in a 5.56 nato chamber (unrifled barrel the bullet travels in BEFORE coming into contact with the rifling. This freebore travel lowers the pressure initially.
3) The ANGLE of the rifling is more graduated or "sloped" on 5.56 nato guns , while the rifling begins much sooner and is more abrupt in .223 rem gun.
The 5.56 nato ammo can be loaded hotter, because 1) it has thicker brass,and the bullet gets to travel more with the freebore before it slows down and increases pressure while jamming and engraving itself in the rifling. Then when it hits the rifling, it gets a nice easy slope into that rifling, unlike .223 rem chambers that have an almost vertical beginning to the rifling with little to no "ramp" to begin the rifling. Thats why it is not a good idea to fire 5.56 ammo in a .223 gun.
 
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SAAMI says 5.56x45mm and .223 Remington are safe to interchange. They are safe to shoot in each others chambers. It is not a complicated matter. Sure technicals could be debated but in the end as a shooter, they're the same practically.
 
PantherD1943 said:
SAAMI says 5.56x45mm and .223 Remington are safe to interchange. They are safe to shoot in each others chambers. It is not a complicated matter. Sure technicals could be debated but in the end as a shooter, they're the same practically.
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you can fire 223 out of a 5.56, but not a 5.56 out of a 223. differences in the rifling leads to excessive buildup of pressure
"These pressures are generated and measured using a chamber cut to 5.56 NATO specifications, including the longer leade. Firing 5.56mm NATO from a chamber with a shorter .223 Remington leade can generate pressures in excess of SAAMI maximums."
http://en.wikipedia.org/wiki/5.56×45mm_NATO
 
Panic said:
It's been 9 days and no reply from Marstar...that's pretty poor CS right there. Thanks for the help guys.
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Not really poor C/S, Because they BARELY post here ( might see John post up once a month if that ) Or some from marstar, mostly just posts up specials, and thats it. Won't find Q and A here.

Got a question, how about you email or call them. Its chambered in .223.
 
RobertMcC said:
Not really poor C/S, Because they BARELY post here ( might see John post up once a month if that ) Or some from marstar, mostly just posts up specials, and thats it. Won't find Q and A here.

Got a question, how about you email or call them. Its chambered in .223.
Click to expand...

Hopefully John is busy writing a book.
 
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