This is one good-looking rifle!! Two thumbs up for AHR, excellent workmanship ! I would also like to point out for the record books that I am the first to own and fire a 600 OK in the state of Mississippi. HAHA! Anyway, here's some numbers from the chronograph....

160gr IMR 7828 - Woodleigh 900 gr solid - 1830 fps[This load will not pass through a 1 1/2 ft thick oak tree (for the tree huggers, the tree was downed by hurricane)]

164 gr IMR 7828 SSC - same bullet - 2025 fps

That was last chrony reading due to lighting but I fired up to 168 gr SSC. Recoil is no problem YET. Will continue testing later this week. When I get some time to study the procedure for picture posting I will do so. The exact rifle is on the front page of AHR website except mine has an orange recoil pad.

Also, to my surprise, I had to order a 600 NE sizing die for loading. I was told the brass was not made to spec?? Are there any plans on placing another order for brass? If not, is there anyone here willing to part with some?

Thanks, KP

KP,
excellent news!!! glad you like it.. can you tell a serious difference from the 1830 to the 2025???

jeffe

It is a difference but I would not call it serious. I have a feeling its going to get serious real soon! Going back out tomorrow for 168 grains on up. I dont think I will get too carried away because I damn sure dont want to screw up my eyes!! If I cant see, I cant fly! cant fly, dont make money! no money, no toys!!!

Yep.. can't screw up your eyes... and my offer still stands.. once you get askird, i'll bring you $500 for it

jeffe

quote:

Originally posted by Mississippian:
This is one good-looking rifle!! Two thumbs up for AHR, excellent workmanship ! I would also like to point out for the record books that I am the first to own and fire a 600 OK in the state of Mississippi. HAHA! Anyway, here's some numbers from the chronograph....

160gr IMR 7828 - Woodleigh 900 gr solid - 1830 fps[This load will not pass through a 1 1/2 ft thick oak tree (for the tree huggers, the tree was downed by hurricane)]

164 gr IMR 7828 SSC - same bullet - 2025 fps

That was last chrony reading due to lighting but I fired up to 168 gr SSC. Recoil is no problem YET. Will continue testing later this week. When I get some time to study the procedure for picture posting I will do so. The exact rifle is on the front page of AHR website except mine has an orange recoil pad.

Also, to my surprise, I had to order a 600 NE sizing die for loading. I was told the brass was not made to spec?? Are there any plans on placing another order for brass? If not, is there anyone here willing to part with some?

Thanks, KP

Hi,
The dies were designed around the turned brass that were made before the drawn brass was made. The turned brass was thicker, so the dies will not size the drawn brass down enough to get enough bullet tension to hold.

I have to order a .600NE die myself. I've used all 100 pieces of brass and need to start resizing the once fired stuff.

Try out some H4350, you'll like it. I am getting 2260fps with the WW and 166.5grs of H4350 with a 23" barrel.

Mississipian

Depending on the quantity I could part with some or you can contact Ed Plummer at AHR.

PM me if interested.

Dak

quote:

Try out some H4350, you'll like it. I am getting 2260fps with the WW and 166.5grs of H4350 with a 23" barrel.

Thanks for the info. I have a pound of 4350 and 414 that I will play with next. Went to 170.5 gr 7828 SSC and got 2158 fps. Thats about all the virgin brass wants to hold without seating the bullet out.

Any opinions on how much the CZ action can stand?

dakota45056...pm sent
Thanks, KP

The origional case drawings had a .015 thick wall at the neck. When Horneber got to actually making the drawn brass due to the process the walls came in at .012 thick.

Since I made the turned brass to the exact numbers on the case drawing they ended up at the specified dimension and those are what CH4D used to make his dies. If anyone needs to order new dies I would let Dace know about the change in wall thickness and he can easily fix that. for those of us with the origional run of dies we're SOL.

Most people are using a 600 NE die to neck size. If you have a collet lathe available you cnd size the necks there as I do. Simply tighten down a 5/8" collet until you get the right tension in the neck. I also use this method for crimping. It works and is very easy to control the tension and crimp.

To keep it on center I use a cup point in my tail stock. works as a stop and keeps the back of the case in line with the collet and spindle.

BTW I'm still shooting the original turned cases and after 5-7 reloads they are still in fair shape. I've pushed them to 2030 fps and they are still going and reloadable. Had a few split necks but out of 100 or so cases I've lost maybe 3 or 4 so far.

FWIW
John

John,
glad to see you back!!

jeffe

Thanks Jeffe, It's good to be back among the living.

" Went to 170.5 gr 7828 SSC and got 2158 fps. Thats about all the virgin brass wants to hold without seating the bullet out."

So if that is a max load for the .600 OK it cant reach 2400-2500FPS?
The barrel length is 23inch?
What about with a 28 inch barrel?

//OK

OK from Sweden,

That was a quick delivery on that 600 Ok rifle. To reach 2400 fps try H414.

Dak

900 grain bullet at 2025 fps, "recoil is no problem YET."

You sir, are one sick puppy. That hurts me just reading it.

quote:

Originally posted by Overkill from sweden:
" Went to 170.5 gr 7828 SSC and got 2158 fps. Thats about all the virgin brass wants to hold without seating the bullet out."

So if that is a max load for the .600 OK it cant reach 2400-2500FPS?
The barrel length is 23inch?
What about with a 28 inch barrel?

//OK

OK,
please READ the post, and then understand the situation
1: TURNED brass .. that means it is PRESSURE limited to far less than extruded brass. "everyone" knows this
2: Virgin brass.. means it is LESS than nominal capacity
3: Can get there, if you want the max vel from virgin turned brass, but you have to seat the bullets out.


Please, please please don't make assumptions if you don't use all the variables...

jeffe

If you use a drop tube, you can get about 173 grs of IMR7828 into once fired cases with some compression. I generally find that I gain about 5 grs of additional capacity with once fired brass vs virgin brass. The max working pressures for the CZ action are around 65Kpsi. I'll bet it will hold twice that, but the brass won't. The cartridge was designed for max boost with H414. It can and has hit 2400fps with 900 gr Bridgers with that powder. Hold on REAL TIGHT! Depending on the barrel length, you lose about 50 fps with each inch below 26. Unfortunately, we could not get brass made with the original wall dimensions from Horneber as Fritz 454 described above. A 5/8 collet or a .600NE sizing die corrects that problem.-Rob

The Horneber brass will take high pressures and in a way it having less thickness at the mouth added more taper to the sides compared to
first turned cases. Which is a good feature as
it allows for easier extraction when you get to max loads.Using H-414(and W-760) at 2400, in my
experiments with big belted wildcats will stretch brass less than using stick powders at 2100. And if you want to work up to the 24-2500
fps range, in a step by step fashion, use AA-Magpro Ball powder, as my latest experiments on straight cases shows it is halfway on ball powder scale, speed wise between
H-414(also W-760) and the much slower AA-8700
(and WC-860-870-872 which are close), slow Ball powders also. It is relatively new.
Also if you want easy loads and cases to last 50 rounds plus, use case full of surplus ball powders(WC-860-870-872) and shoot a lot cheaper.
Below is comparative speeds in my 458HE,
500 gr bullet, long barrel,Fed 215 primer,and 120 gr of powder, a full non-compressed
nonsettled load.
AA-8700- 1820 fps
Wc-872-- 1900 fps
WC-860 - 1960 fps
AA-Magpro- 2280 fps
H414(W760)-2550 fps
Now full compressed loads, with minimum
seating debth is 135 gr in my cases.Ed.

Lots of good information here! Thanks!!

quote:

900 grain bullet at 2025 fps, "recoil is no problem YET."

You sir, are one sick puppy. That hurts me just reading it.

Fjold,
Let me clarify; That is "problems" as in my shoulder is still in place and my retinas aren't bouncing off my sneakers! Yes it does have a large amount of recoil but Im not ready to throw in the towel. After I get finished playing with this thing I feel most of the rounds I load will be in the 1900-2000fps range.

quote:

" Went to 170.5 gr 7828 SSC and got 2158 fps. Thats about all the virgin brass wants to hold without seating the bullet out."

Overkill,

I loaded 5 more rounds tonight with once fired brass. (The big bore ferry left a 600NE sizer on my doorstep!!) The hottest being 174 gr 7828 SSC with Woodleigh solids at 3.6 OAL with slight compression no drop tube. Thought I would fire these before going hotter.

KP

Try shooting a gallon jug of water with the 174 gr of IMR 7828 load. I'ts impressive. It does the same thing to animals! Most people run the 168gr load for practice. It exceeds the .600NE easily and yet is basically a light plinking load. I designed this gun and cartridge from the start to be extremely shootable and everyone who has tried it acknowledges that. It doesn't start to get wild until you start to exceed 2300fps. Then HOLD ON TIGHT. Give your wife the phone number of your opthamologist and have his laser warmed up.-Rob

I dont understand everything here.. For the first.. I am not a hand loader..
If you buy brass form hornebear and then put 174 grain of H414 powder and a woodleigh 900 grainer. Are you then going to get 2400-2500FPS with a barrel lengt of 26-28 inch?
And how much powder can a .600 OK take? 174grains?
//OK

Overkill-Yes you should get about 2400 with
that much H-414, 174 grains,
on that long of a barrel.It should
hold alittle more depending on compression.Ed.

Overkill- I don't understand, last time you told us you handloaded for your 460 wby that you shot so many ELGE with. You wouldn't be pullen our leg would you?
I've got some video of 175grs of H414 in the .600OK. My records say that a once fired case will hold about 181 grs of H414 with severe compression (after using a drop tube 24inches long). Be AFRAID BE VERY AFRAID. Just remember that these are well made guns flying through the air not A-square hannibal crap. I will take absolutely no responsibility for whatever happens with this level of load! The gun will take it but you'll probably be sorry!-Rob

I'd love to see some video of the 600 if you could post it Rob

I've run mine up to the 2400 range a few times with 414 but it is really only a stunt. There is no need to do so in the hunting fields as your second shot will effectively need you to remount the gun and delay any possible follow up.

At 2200 to 2300 is it is not bad at all to shoot. NO it's not a 375 H&H but if you can handle a lott at full house loads you can handle this.

I've settled on 168 grs of 7828 as practice load and 173 grs for any hunting. Since I have a long barrel I'm getting good velocities with this load and recoil is very tolerable. I've taken it to the varmint fields on more than one occasion and the gophers and dogs simply disappear when hit. Just a pink mist.

IMO this is the reason there is little need to do the 600OK versions 1 and 2 as you simply couldn't hold on to the gun.

John

fritz,

I have a Lott, and I have shot jeffe's 550 Exp. How would you rate the recoil of the 600 OK to the 550?

Hog Killer

Rob-
No I dont hand load.. but I have a friend who does. He has load my .460 with the 500 grain hornady sp for 2 years now.
You have been missunderstanding me.
I would NEVER pullen your legs.
So 181gr is max.. 2400FPS with a 900 grain bullet is enough even for me

And sorry for my bad english..

//OK

HK, I would say that my 550 Mag at max loads is about equal to the 600 at 2250. Now my 600 Ok has 2 extra pounds to it so that makes a lot of difference.

When you get to 2400 as Rob says "use at your own risk" it is flat ass nasty. I doubt you could push a 550 mag hard enough to even get close to that level of recoil. The 600 is very shootable until you hit 2300 after that it gets brutal really fast. I mean brutal.

I've shot my share of big kickers and this is by far the worst when pushed to 2400 plus. My 500 A2 in a 9 lb rifle feels like an 06 compared to the 600 at max loads and I used to think that was as bad as it could get.

The 600 wants to twist out of your front hand and it does it fast and with a lot of force. Muzzle rise is substancial and what your body has to absorb is ....well you have to experence it but take a look at Saeed's videos of people shooting the T-Rex and your getting close but it's worse than that. IMO.

Since recoil is so subjective and stock shape, weight, fit and probably a bunch of other factors affect it, an absolute comparison is impossible. This is just my "feel" for it.

Load it to 2250 or so and hunt or shoot it. It will be a shootable and it will put down anything that walks and is dam accurate to boot.

I will never be with out one. Once you shoot it you will love it. Just a good package that most can master with a tremendous amount of power, KE, ME, TKO whatever you prefer. This one is king.

John

Hi KP,
Just stopped by the forum and noticed this thread.
I just remembered I have a box of lathe-turned brass from Fritz. From what I'm hearing here these work with the original dies (?)...
If you'd like them let me know and they're yours, no charge.

Have fun,
Mark.

300H&H,
YES!! I wont turn that down!! Thanks, KP

Fritz 454

Appreciate the detailed recoil description of the 600 OK at 2400 fps with the 900 grainers. Rob always talked about it being a tough experience Incredible that the rifle will develop such a torque force and recoil that apparently surpasses the 577 T Rex., but you have filled in all the details, at least for my curiosity. To date I have reached 2280 fps and I think that may be my natural limit. The rifle just starts to get a little frisky, but still is under control for hunting purposes.

This has to be one of the best magazine hunting big bore cartridges ever.

Dak

quote:

Originally posted by 300H&H:
Hi KP,
Just stopped by the forum and noticed this thread.
I just remembered I have a box of lathe-turned brass from Fritz. From what I'm hearing here these work with the original dies (?)...
If you'd like them let me know and they're yours, no charge.

Have fun,
Mark.

I've been off the forum for so long I don't know what's going one anymore.

Did Mississippian buy the rifle you were having built, Mark? Did you ever get the barrel band from the 'smith that built my rifle?

Hi George,
Yep, KP bought my 600. I did get the barrel band from your 'smith and Ed installed it and it looks great. Thanks for the contact, he does good work.

Mark

KP,

Wow!!! That's incredible!! How much did the rifle cost you? I can't imagine shooting it! I heard the Heym 600 nitro bolt rifle is quite a kicker.

Any chance you would consider selling one of the 600 OK rounds? I would love to have one in my collection.

Thanks,

KNM