ammo help
I just bought a new scope and ammo for my 270. When i went to sight my rifle, my ammo (270 winchester super x) was actually 30-06 ammo. I checked the box again and the box was 270 how could this happen? Also what would have happened if i tryed to shoot this? Thanks David
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Hello,
So is the 5.45x39 a .308?
what does the 7.62x51 match up with?
also what about the 7.62x54 does it match up with any other caliber??
Thanks for the answers.
Slim0 -
no no ..the 5.45 is like our 223/5.56 nato..7.62x51 is the military load of the 308..7.62x54 is as powerfull as the 3006 0 -
Would this ammo be considered 'light ball' or "heavy ball"
http://www.sportsmansguide.com/net/cb/cb.aspx?a=465896
thanks again0 -
Light ball. I think heavy ball is around 180 grain. 0 -
quote:Originally posted by Slimpicken5
Hello,
So is the 5.45x39 a .308?
No.
Its a Russian military cartridge that is ballistically similar to the 5.56 / .223 round used by M16-style rifles. The Russkies use it in the AK-74, which is a Kalashnikov pattern rifle.
But it is NOT interchangable with the NATO standard 5.56x45 round.
quote:what does the 7.62x51 match up with?
7.62x51 NATO is a military loading of the civilian .308 Winchester round.
This ammo can be fired from "ordinary" .308 Winchester hunting rifles, though it may NOT be OK to fire more powerful civilian .308 rounds through military style guns in 7.62x51.
quote:also what about the 7.62x54 does it match up with any other caliber??
The 7.62x54R is an old Russian rimmed cartridge used mainly in Mosin Nagant rifles, but also in some more modern guns (eg AK-like sniper rifles, etc). The "R" stands for "Rimmed". Some people call this one (colloquially) the "30 Russian", which is probably a reasonable name.
This round is ballistically similar to a 30'06, meaning its actually a fairly powerful round.
But it does NOT interchange with a 30'06 or .308 or any other common Western round.
The 149 Grain Bulgarian military surplus 7,62x54R is "light ball", though don't assume its particularly "light" on your shoulder when you fire it!0 -
quote:Originally posted by Henry0Reilly
If you handload and you modify the extractor in a Mosin Nagant, you can substitute .308 or 7.62 NATO cases for 7.62x54R. This is not recommended for people new to reloading. The chamber pressure on a Nagant is much lower than either 308 or NATO standards even though the cases are dimensionally similar.
Not sure how you can justify that statement Henry. If a chamber insert was made you could, but the 7.62X54R is longer than the .308, and is MUCH fatter. Even if the extractor handled it you would blow the case out on every shot, The bolt would take the full force of the combustion with little obduration, and besides a face full of gas from the cracking (exploding) cases, you'd also face eventual lug set back at best. If it was a do or die situation I'd try but otherwise no way!
As for pressures, looking at IMRs loading data, most loads with a 150 grain bullet (just for example) generate in the 43,000-47,000 psi range. The Mosin round runs 38k-41k. That definitately is lower but I'd not say 'a LOT lower'. And that's for handloads- I suspect much of the milsurp ammo out there runs a little hotter yet.
Besides that the nominal bullet diameters are different. A .308 going down a .311 bore will offer marginal accuracy at best.
Fire the ammo your gun was chambered for and no other! [xx(]0 -
quote:Originally posted by jonk
quote:Originally posted by Henry0Reilly
If you handload and you modify the extractor in a Mosin Nagant, you can substitute .308 or 7.62 NATO cases for 7.62x54R. This is not recommended for people new to reloading. The chamber pressure on a Nagant is much lower than either 308 or NATO standards even though the cases are dimensionally similar.
Not sure how you can justify that statement Henry. If a chamber insert was made you could, but the 7.62X54R is longer than the .308, and is MUCH fatter. Even if the extractor handled it you would blow the case out on every shot, The bolt would take the full force of the combustion with little obduration, and besides a face full of gas from the cracking (exploding) cases, you'd also face eventual lug set back at best. If it was a do or die situation I'd try but otherwise no way!
As for pressures, looking at IMRs loading data, most loads with a 150 grain bullet (just for example) generate in the 43,000-47,000 psi range. The Mosin round runs 38k-41k. That definitately is lower but I'd not say 'a LOT lower'. And that's for handloads- I suspect much of the milsurp ammo out there runs a little hotter yet.
Besides that the nominal bullet diameters are different. A .308 going down a .311 bore will offer marginal accuracy at best.
Fire the ammo your gun was chambered for and no other! [xx(]
One of our old timers at the gun club had huge collection of military surplus rifles. He had stacks of 3 ring binders full of targets noting the type of bullet, the source of lead it was cast from, w/ or w/out gas checks, lube, powder charge, type of case, etc, etc. He could make any of those old guns print cloverleaf groups at 100 yards if the bore was decent at all.
He used 308 cases for his nagants. I never looked to see exactly what he had done, but I took his word for it.0 -
quote:Originally posted by Slimpicken5
Hello,
So is the 5.45x39 a .308?
the 5.45x39 is a .21" bullet
The .308 fires a .308" bullet
No, they are nothng alike, nor will a 5.45x39 fire in a gun chambered in .223Rem./5.56x45nato
what does the 7.62x51 match up with? .308 winchester.
also what about the 7.62x54 does it match up with any other caliber?? no.
Thanks for the answers,
Slim0
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