Robert,

Second to last post as POSEUR, I promise. According to the software, your new load of 170 grains of H414 will do:

Muzzle velocity - 2209 fps
Muzzle energy - 9731 lbft
Chamber pressure - 41,617 psi (max avg)

Definitely a good kicker, but still short of the 2400fps mark.

Your advise concerning lug setback is sound too! I would follow it to the letter.

"Unleashing the 'Killer of Giants'"

Ok, where to begin? It wasn't bad! I was expecting worse. Now, keep in mind the rifle finished out right at 13lbs. There are two 11oz. mercury recoil reducers in the buttstock. The brake has plenty of surface area for the gas to push against. All these factors make this rifle extremely shootable.

RobGunBuilder said that max was 165grs. of IMR 7828, so I loaded (3)150grs., (3)155grs., and (4)160grs. to start. I "warmed-up" with 5 rounds of .416Rigby(400grRN over 105grs. of H4831SC). Had to stretch a bit so I didn't pull anything.

Keep in mind that felt recoil is subjective. What I am going to describe is what it felt like to ME.

The 150gr loads were surprising to say the least! With 150grs, there was still air space under the bullet. You could hear the powder rattle around. Now picture that I shot this for the first time at the local monthly USPSA match. After the pistol match, but before the carbine side match. There were approx. 15 guys standing around making various predictions. You know, broken bones, concussion, dropping the rifle, getting knocked over, that sort of thing. I had forgotten my Past puss pad, so it was just me and the gun. The recoil wasn't much worse than my .416! My Ruger weighs approx 10.5 lbs. I had the old "death grip" on the gun, and was completely suprised that the gun didn't jump out of my hands.

The 155gr loads were a bit warmer. You could tell something was happening. 155grs wasto the bottom of the bullet, no rattling. Recoil was a bit stiffer. I've never shot a .458Lott, but I expect this is what it would feel like. The two .458wins I've shot had less felt recoil than my .416Rigby.

The 160gr loads, well these were stout! Not unshootable, not unbearable, but stout. The pics below are from the 160gr loads. Of course after I shot a few rounds and didn't die, some of the others expressed an intrest in shooting the rifle. All I had to share was the 160's, haha.






Here's a pic of another shooter who didn't wrap his thumb around the wrist of the stock. The cocking piece smacked his thumb, hard.



Here's the gunsmith giving her a whirl.





I have no idea of the velocity, we didn't have a crono with us. The barrel was cut down to 23 inches, so I expect less than what Rob got. We will get a crono to the range next time. I will be loading up a bunch at 165grs for the next range session, probably next weekend.

We shot a 20 gallon water barrel(end on) at about 15yards. It ruptured the side of the barrel, blew off the bung and exited the other side. Three feet of water and it went right through, skipped off the ground and wound up in the berm somewhere.



Next time we are going to try two 55 gallon drums, end to end. We'll see if we can stop a bullet.

Right on George!!!! Looks like serious fun - thanks for the great pictures - KMule

I am curious as to how effective the muzzle brake is, as I am not a muzzle brake person.

Great pics!!

the rifle looks pretty durn good, and the pics are great for showing the effects of recoil.

the fella that looks like he got a "iron sight" cut (how do you do that) was not holding the gun, at all... TOO relaxed.

looks like you've got abotu 22-26" of muzzle climb, which, with a couple hundred rounds, will come down to 6 to 12,,, seriously.

thanks for sharing this..

jeffe

I am so cut up that this .600 OK was invented not long after I built my .585. One day I have to get one of those.

Yours looks great well done !!

Ya done a great job on your project! Looking forward to seeing more pics of your lighting off that cannon again. It would be a plus if it can come up with nice groups too.

George- Congrtats! You beat AHR in having the third .600 OK up and running.There is one more I know of and it should be operational shortly. Now go for 165grs of IMR7828. That will impress you but it's still quite shootable. You should be getting around 2050 fps or more with this load.Thats about 100 fps faster than a .600 NE. Your gunsmith has done a very nice job and the combination of a good recoil pad,proper stock design, effective muzzel brake and Mercury recoil reducers really is effective. If anyone doesn't believe me, try shooting that load in a .600NE Heym. Looks like your getting good accuracy ( minute of buffalo) and man that gun whallops those 55 gallon water jugs. I've never recovered a solid, but have some real nice 1 inch balls of lead and copper from some Oak logs I killed.-Rob.

Thanks guys, shooting it was fun. There will be more pics soon. We took some video also, but have no way of posting it.

Smallfry, I wasn't brave enough to try it without the brake, maybe next time.

Rob,
The rifle wasn't really sighted in properly, but it was very close. I could hit basketball sized rocks at 50 yards with it. The gunsmith filed in the rear sight with what he figured was the correct depth, it was very close.

GeorgeInNePa,



Very nice!!!!



Here is what the software says for your loads. The calculated case capacity was 211.7 grains of water. COL was taken as 3.75"



150 grains of IMR7828:

Muzzle velocity - 1762 fps

Muzzle energy - 6197 lbft

Chamber pressure - 27,223 psi (max avg)



155 grains of IMR7828:

Muzzle velocity - 1810 fps

Muzzle energy - 6545 lbft

Chamber pressure - 27,873 psi (max avg)



160 grains of IMR7828:

Muzzle velocity - 1858 fps

Muzzle energy - 6895 lbft

Chamber pressure - 28,458 psi (max avg.)



Not up to 600 NE levels yet, but still impressive. Pressures are nice and low too. Analysis suggests a better powder selection would be one of the 4350s or Rel 15 for 600 NE power levels. If you want to really rock and roll go with Varget, IMR4064, 4895 or IMR3031. These will push your pressures up into the 50+ ksi range and the velocities get REAL impressive. So will the medical bills I would wager.



For instance:

155 grains of IMR4895

Muzzle velocity - 2451 fps

Muzzle energy - 11,991 lbft

Chamber pressure - 56,357 psi (max avg)

George, Your gunsmith has done a great job on that rifle! He charged in on a relatively little known caliber, but of course Robgunbuilder has shared his info and coached us on that caliber. It appears that you have all the recoil reducing items in place. My 600 OK is scheduled for 14 lbs, I hope and a 25 inch bbl, but otherwise it should be quite similar. I had a smile when you were talking about walking on up to 160 gr of IMR 7828, which Rob estimated would still be below 2050 fps. He estimates 165 gr gives 2050 fps. I naively thought this rifle could be fired at 1950-2000 fps with no brake , but then have never shot anything over a 600 grainer either. From all discriptions, at 2000 fps for field use, the rifle will still need to be braked.

Thanks for sharing your data on the rifle, keep us informed on your final loads.

DAK

Three groove barrels typically prove to be 50 to 75 fps faster than 6 to 8 groove barrels. My barrel is 26 inches long so I see some added velocity due to barrel length.You may also notice no copper fouling with the 900 gr woodleighs at velocities below 2100 fps. As you start to exceed 2100 fps the TORQUE becomes a problem in holding on to the gun! Wait till you shoot those loads! Do NOT let a Novice shoot any of these loads as they may not be able to hold onto it at all! By the way, how is the feeding? My CZ550 feeds very smoothly! Your gunsmith should be congratulated, this is not a project for anyone but a true master gunsmith IMHO. Remember that you'll probably need a .600NE sizer for reloading the fired cases.--Rob

When I was a kid and we had a good time, we'd say: "We had a blast!"

I don't think kids say that anymore, but it sure looks like your experience with your new cannon met the definition--literally!

I'd be careful about letting others shoot it, though.

Having seen how Saeed's victims of the .577 Tyrannosaur's recoil end up falling on the floor, losing control of the rifle and sometimes even dropping it and breaking down doors with it, I'd be reluctant to let a rookie just bang away with that beast!

Rob,

I'll be trying the 165's this weekend. I would like to get up to around 2150-2200 fps. I think I might have to work up to it. I don't want to get nutty and make myself afraid of the rifle. What advantage is the 600NE die? Does it size the base smaller?



Please email me some suggestions for loads in the 2100 to 2200 fps range. I'd like to try out a work-up to them. I have your cell number and if it's not too late tonite when I get home, I'll give you a call.



Edited to add:

Feeding. When it was just the barreled action it was feeding fine. Now that it's all together, there is a little problem from the right side of the mag(first round down). It feeds the left side fine. The 'smith is going to fix-make better.

Dakota,
With the 23" barrel and 22ozs. in the butt the rifle is almost perfectly balanced. It balances just in front of the forward guard screw. You might need to put somemore weight in the butt of yours for balance.

I would put a brake on it. You can always take it off. According to the guys at the range, there was a nice muzzle flash out of the ports, so it's working.

Garnick,

Quote:

---

Three groove barrels typically prove to be 50 to 75 fps faster than 6 to 8 groove barrels

---

Wrong, typically they run slower with lower operating pressures.

Quote:

---

You may also notice no copper fouling

---

This is most likely correct IF you are using a polygonal rifling.

I suggest you get yourself a new chronograph though. You have NEVER posted an accurate muzzle velocity from a big bore yet. They are always about 300 to 400 fps too fast.

George, those velocities I provided will be very close to reality. But hell, you don't really care, you built this thing to brag about how bad assed it is. It could be very bad assed, just use a faster powder and crank up that muzzle velocity, you won't get there with IMR7828!

POSeur( Piece of Shit er).- I TOLD YOU BEFORE ,NOT TO ADDRESS ME or MY POSTS PERIOD! Is THAT NOT PLAIN ENOUGH FOR YOU? WHAT PART OF THAT DON"T YOU UNDERSTAND! PLEASE PAY CLOSE ATTENTION! FOCUS ON WHAT I JUST SAID and TRY TO COMPREHEND! I KNOW IT"S DIFFICULT, BUT READ CAREFULLY and REPEAT AFTER ME! I POSeur, Aka SCOTT SWeet will not ever again reply to ROBGUNBUILDER because he knows I"M a TURD and its beneath him to bother with me. Still WITH ME HERE SCOTT? This is George's thread and your just trying to hijack it. George did something you'll never ever be able to do and your just JEALOUS! Your hate all of us because we are what you'll never be. COMPETENT, KNOWLEDGEABLE, HELPFULL to others and willing to SHARE our Knowledge. YOU ARE A LIAR and a PHONYand WE all know it! I PITY YOU! YOU pathetic ASS-CLOWN. Now Your dismissed! -Rob

Funny, my chronograph and Rob's are just about on track with each other for other wildcats. It seems that scott sweet's 'software' is always slow in its velocity numbers.

How did that home made 4 bore barrel and action come out anyway scott?

George,
Great job. I was hoping to have my 600 done by now but no dice. I think its getting close but my smith has been telling me next week for 6 months now. To think I sent this gun out because I didn't have the time to do it myself. I could have made 3 in the 18 months since I dropped off all of the parts. Anyway well done.

Rob and Dan, this is the difference between those that do and those that wish they could.

I've got an old sigh in my shop, given to me by the gentleman who I apprenticed under that reads: You can't build a reputation on what you intend to do".

It's amassing how many of these arm chair experts can quote books and ballistic programs, and on occasion steal off the web, but have no real experience with the subject matter. In fact I received an email from Pac-nor about his 3 groove barrels that indicates higher throat pressure due to the increased width of the rifling. Not lower pressure but he only makes the barrels so what could he know.

But alas I must defer to the gentleman in the lazy boy with the potato chips on his sweats.

George, that's a beauty. Tell your smith "Well done."

Congratulations on getting it finished.

Rick

I thought you were ignoring me (or us since you insist on claiming I am Scott, too).

I found it Robert, the other MAJOR velocity error your chronograph produced, other since your 600 OK velocities have been "Weatherby'd"

To refresh your memory old boy:

Quote:

---

We have some seasoned black oak logs from a tree that blew over two years ago. My 500 AHR with 570 gr woodleigh softs behind 118 grs of IMR4831 barely made it 12 inches into this stuff. My chronograph results were slightly less than 2400fps with the 570 woodleigh

---

118 grains of IMR4831 AIN'T gonna get NO 570 grain Woodleigh to ~2400 fps in no 500 Jeffery, 500 AHR, 500 A Square, 505 Gibbs, NO WAY NO HOW! More accurate number would be around 2080 fps - 2100 fps.

Kinda like 165 grains of IMR7828 ain't gonna get no 2050 fps in your 600 OK.

I am outta here, Scotty boy was right, this place is PATHETIC.

Lets see now, Scott Sweet(POSEUR-Piece of Shiter) a self acknowledged Ass-Clown with NO Verifyable Mathematical Degree or Technical one at that, No Certified knowledge of Ballistics and NO Verified ACTUAL experience with any real Big BORE ,quotes velocity and pressure data from a "program IT Wrote itself for rifles and Cartridges it has only GOOGLED" Ha Ha Ha! Your Programs suck just like you do Scott! You have never even fired( correction, Never even SEEN) a gun with anywhere near the capability of a .600OK but pretend to be an EXPERT? Of Course you could prove us all wrong by POSTING REAL PICTURES of YOUR BIG BORES especially your make believe 4- BORE! Scott where are your CREDENTIALS! WHERE is the EVIDENCE! WHERE are the FACTS! POST EM HERE! NOW! No fake pictures like before either! IT will be a cold day in HELL before WE ever see anything but BULLSHIT from you won't it SCOTT/Poseur/Axel /Judy/500 AHR etc.? Do you follow me so far Scott? Focus, Concentrate. Stay off your Meds for just long enough to try to understand this message! WE Know Your a Moron you don't have to keep proving it!You have at last been successful at something, You have definatively proven beyond all question of doubt that YOUare the BIGGEST ASS-CLOWN of all time! You are Dismissed now! -Rob

George
Very nice! I hope to be shooting mine this summer. I am sending the barrel off to be threaded this week. I have the actiond feeding and fit to my stock. I am glad yours turned out so nice! I think ill make my barrel 24 inches.
Dean

Scotty boy got to you didn't he. Sorry Mr. Garnick, but I am not Scotty. As far as back-up is concerned, you would only need to look at A Squares manual to see that both your 500 AHR, which is nothing but a 500 Jeffery with a .15" longer neck, achieves a muzzle velocity of just over 2100 fps with a 570 grain pill and 118 grains of IMR4831.



Referencing the same book, the 600 OK, which is practically identical to the old 600 NE, and referencing the 600 NE the data therein is frighteningly close to the software predictions. I believe Saeed's own data for the 600 NE will support the software's predictions as well. Remember H4831 is slightly faster (about 2% according to Scotty) than IMR7828.



By the way, I never said the 600 OK wasn't a hell of a round. IT is if you load it to 50,000+ psi! Heck at those levels it will easily beat 2400 fps with a 900 grain pill, more than likely splinter your wooden stock, and maybe injure the shooter!



Now if you can control yourself and stop addressing me, I will leave this pathetic place for good.



Finally, I am surprised no one caught the one error I diliberately place in a previous post. It is parabolic rifling, as developed by Mr. Newton, no polygonal. Just wanted to set that straight before departing.

Good post, Robgun. I always enjoy watching you drop kick Scott Sweet and his bs...whatever phony name he happens to be hiding behind.

He's like a little child covering his eyes and telling himself he's "invisible." Scott Sweet may change member names every other day, but one thing remains constant....his stupidity.

He hasn't got a clue and is too dumb to know it. There's more to knowing something about guns and hunting that having a subscription to Field & Stream.

*** You are ignoring this user ***

POSEUR- ASS-CLOWN

Robgunbuilder:

Bravo! I don't read his posts, IGNORE THE IGNORAMUS is my motto, since our kind host has enabled it through advanced software.

But your riposte was priceless. ASS-CLOWN pretty much says it all.

What this ASS-CLOWN doesn't know has filled volumes!

George that is a great looking gun.Reminds me of custom 500 linebaughs.It has the characteristics of a true hunting firearm but with an added metallic evilness.



Rob how did the 600 OK go on oak logs penetration wise?



I remember you gave a comparison between the 585's and the 50Bmg at one stage. Can you go over that again?



Karl.

George, when you first showed me the empty case last year at the sportsmans show I was impressed. Now that I've seen the nearly finished product, I'm even more impressed, although I do question your sanity . Of course, after hunting with you a few times, I should have known . I wonder how this rifle would work on the Buffle Heads?

Mike,
I could probably miss them just as well with the rifle as I do with the shotgun.

I normally keep the ASS-CLOWN ( ScottS/POSEUR/AXEL/Judy etc) on ignore too but I just got a new computer and was interested in George's great results with the .600 and forgot to put the MORON on IGNORE. Your right! The words ASS-CLOWN really fits my mental image of Scott!It also has a certain ring to it that just totally symbolizes everything we have come to loathe in Scott and his many identities!ASS-CLOWN-THATS SCOTT! I just had to pay ol Scotty-POO my respects-NOT! Ignore is back on now!-Rob

Robert



You have been B U S T E D !



ASS-CLOWN. I like that handle. It is got a better ring to it than POSEUR. Too bad, I cannot change my POSEUR handle. Guess I will have to retire it and return as ASS-CLOWN!



I ain't Scott, but you really don't care do you. You are just in this for the recognition (attention). Why else would you discourse with someone you say you hate?



George better get himself the "Weatherby" model chronograph if he thinks 165grains of IMR7828 is going to net 2050 fps (the "Weatherby" model adds 150 fps to every measured velocity automatically)!

George- Now go to 160 grs of H414 and move up carefully to 170 grs with 900 gr Woodleigh sp's.At 165 grs you should easily be at 2180fps with pressures under 50Kpsi. Make sure you can control the gun! I hit 2400fps with my 26 inch barrel with 170 grsPressures were probably near 57Kpsi and this was in my GMA gun.. This is serious power. The torque of the gun will try and rip itself out of your hands. Start low and move up slowly! Don't let a neophyte try these loads.! Whatever you do, don't take your face off the stock and let your body roll with the recoil. It won't hurt you, but your now in a place where few have ever gone! Check your bolt lugs and look for any signs of problems as you move up in charge weight!-Rob

WEll PC ,looks like you will have to get a 700NE now that the 600OKs are becoming common, how about it.