8x56R Carbine Velocity?

Fox

Fox

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I ran the PPU ammo over the chronograph and ended up with about 2050fps, not the 2300fps claimed but I figured that was from a rifle.

I did some love development, running up to 45gr of IMR3031 and noticed that my best group was at 43gr, which was at 2060fps.

Has anyone else worked up loads for the carbine? I am trying to figure out if this velocity is in the ballpark of reality compared to the 30in barrel rifle.
 
Mine is a carbine made by Steyr.
PPU gave 2230 fps
44 gr of 4895 gave 2140 fps
45 gr of 4895 gave 2230 fps
46 gr of 4895 gave 2250 fps

All with PPU 8mm (.330) bullets 208 gr
 
Bringing this back up as I was finally able to get to the range.

The 1944 military stuff ran right around 2320fps, so the IMR 3031 does not seem like it is going to cut it.

Anyone run IMR3031 above 45gr in this gun? I know some people say to use it and go up to military velocity but Quickload shows it well over safe.

Maybe I go back to IMR4895 and push it up to 47gr.

Oh, pulled apart 1 round, had exactly 47.0gr of a weird square flake powder with the 208gr FMJ BT bullet.
 
I’m sure the rifle/carbine is older than you, so keep that in mind. The original old ammo is hot, plenty hot. We tried taking a bit of plating off the nose and fired a round from about 20 feet away into a five gallon oil pail filled with water. The lid had never been taken off, so it was well attached. The pail split wide open and the lid went straight up in the air about 15 of more feet. Never did find the bullet. Next test we had three pails one behind the other. First pail, same thing, lid blew off, pail split wide open. Second pail split open, lid stayed on. Third pail showed where the bullet had ricocheted off. Never found that bullet either.
 
kjohn said:
I’m sure the rifle/carbine is older than you, so keep that in mind. The original old ammo is hot, plenty hot. We tried taking a bit of plating off the nose and fired a round from about 20 feet away into a five gallon oil pail filled with water. The lid had never been taken off, so it was well attached. The pail split wide open and the lid went straight up in the air about 15 of more feet. Never did find the bullet. Next test we had three pails one behind the other. First pail, same thing, lid blew off, pail split wide open. Second pail split open, lid stayed on. Third pail showed where the bullet had ricocheted off. Never found that bullet either.
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How do you know how hot it is? Based on Quickload it would be running around 50,000psi.

The age of the gun is not of concern, steel in good condition does not degrade. The problem is with pitting and rust that you cannot see but a fluid barrel does not delaminate and the carbon does not leech out of it with normal operation. Guns were designed to be shot so keeping them under their load maximums (not proof loads) you should not have a problem shooting them indefinitely.

Yes, this gun is older than you too, it is 108 years old, mind you the K98 design is 125 years old and nobody has issues shooting that with modern ammo.
 
I chrono'ed the 1938 stuff at 2380 from a Carbine. It shoots a foot high at 100.

To shoot to the sights at 100 yards velocity needs to be sub 2000 fps, 40gr or so of 4064 will do that.
 
MiG25 said:
I chrono'ed the 1938 stuff at 2380 from a Carbine. It shoots a foot high at 100.

To shoot to the sights at 100 yards velocity needs to be sub 2000 fps, 40gr or so of 4064 will do that.
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I have a load that is accurate and just a tad high at 50 yards, just over 2000fps, my concern I guess is expansion but how far am I really going to shoot this battle sighted rifle on game.

Yes I have hunted with it in the past but only got a really expensive grouse with it :)
 
Fox said:
I have a load that is accurate and just a tad high at 50 yards, just over 2000fps, my concern I guess is expansion but how far am I really going to shoot this battle sighted rifle on game.

Yes I have hunted with it in the past but only got a really expensive grouse with it :)
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All I can tell you is I shot a Muley (say 250lb live weight) with it probably going 1850fps, he took 2 or 3 jumps and then went sliding down the Mountain like a toboggan. Expansion wasn't lacking from what I could see, bullets exited. This was with Hornady's bullet.

Ballistics are very similar to factory 35 Remington from what I can tell.

I wouldn't hesitate to use it for hunting.
 
MiG25 said:
All I can tell you is I shot a Muley (say 250lb live weight) with it probably going 1850fps, he took 2 or 3 jumps and then went sliding down the Mountain like a toboggan. Expansion wasn't lacking from what I could see, bullets exited. This was with Hornady's bullet.

Ballistics are very similar to factory 35 Remington from what I can tell.

I wouldn't hesitate to use it for hunting.
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Great info, thanks, I was worried about the 1800fps rule with Hornady bullets. I got 400 205gr Hornady soft points, new old stock, for a great price so excited to load them to a reasonable velocity.

Based on Hornady info, assuming half way between the 8mm and 338 bullets the BC should be about 0.420 so at 200 yards the velocity is going to be about 1700fps when the muzzle velocity is at 2050fps, the energy is not a problem that is for sure, ha ha.
 
Fox said:
How do you know how hot it is? Based on Quickload it would be running around 50,000psi.

The age of the gun is not of concern, steel in good condition does not degrade. The problem is with pitting and rust that you cannot see but a fluid barrel does not delaminate and the carbon does not leech out of it with normal operation. Guns were designed to be shot so keeping them under their load maximums (not proof loads) you should not have a problem shooting them indefinitely.

Yes, this gun is older than you too, it is 108 years old, mind you the K98 design is 125 years old and nobody has issues shooting that with modern ammo.
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My goodness. Thank you for pointing out all my failures. I’ll stay out of your way if I can.
 
kjohn said:
My goodness. Thank you for pointing out all my failures. I’ll stay out of your way if I can.
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I thought he was a tad hard on you too there kjohn.
I'm wondering if your post got lost in translation, as I often judge the power levels of ammo by how dramatically they explode a jug.
One of my favorites is a 100gr Sierra HP varminter from a 30-06 hand loaded "hot", shooting a windshield washer jug full of water with blue food coloring is a sight to behold!
 
If you plan to run cast with a LEE mold get the .338 mold instead of the .330 as bores are on the generous side.
 
I bought both of the Lee moulds and found both of my carbines shot well with 0.330 bullets. Cast is much easier on the shoulder and you can drop the velocity down to have bullets hitting where your aiming at instead of shooting close to 2 ft high.
 
Sun_and_Steel_77 said:
I thought he was a tad hard on you too there kjohn.
I'm wondering if your post got lost in translation, as I often judge the power levels of ammo by how dramatically they explode a jug.
One of my favorites is a 100gr Sierra HP varminter from a 30-06 hand loaded "hot", shooting a windshield washer jug full of water with blue food coloring is a sight to behold!
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I do not know how you or he can determine that I was being hard on him, I was asking the question as to how he believes this is "hot".

The number of people who have told me that I should not be shooting an old gun because the steel is old got old a very very long time ago. We have to remember that many of the hunting rifles out there built in the 70s and used now are on actions designed well over 100 years ago and many built 100+ years ago, heck, the 870 is 71 years old and used without any sort of mechanical change since then, the still will not degrade unless something happens to it.

I get my guns checked, just had some antiques checked and given the green light to shoot and I do not worry about running anything up to SAAMI specs as those were designed with older actions in mind. This is exactly why the SAAMI numbers for the 8x57 are so low, they take in to account 0.318 bore guns as well as 0.323 bore guns.

I was able to hunt a couple years back with an 1861 rifled musket, not a repro but an original, it was very cool and 100% safe with loads that it was designed to shoot back in the day.
 
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