I am seriously thinking about to order a new Blaser R8 in the 500 Jeffey in the near future.
So I want to get at least 2500 fps wth a 600 grainer and and 2600 fps with a 570 grainer.. is this possible in the storng blaser action? with the strong quality cases from norma?
The blaser has a 24" barrel if I remeber right.
If this is not possible then I see no need to buy one.. when my .460WBY gets a 550grainer to 2500 fps.
And all talk about pressure.. why cant you load a 500 jeffery to the same pressure as a 500 a-Square in a storng rifle with high quality brass? I dont really get it.
I hope for many wise and good answers
So let´s talk about the 500 jeffery and clear out Everything about it one´s and for all.
And sorry for my bad English.
//Overkill from sweden

I have an R8 in .500 Jeffery. Just a word of caution regarding reloading. On my rifle, may not be an issue on all rifles, I find that reloaded .500 Jeffery ammunition will not fully chamber and lock without essentially slamming the bolt home. With Kynoch ammunition this is not an issue. Of course it could be my dies or something else, but I have a .500 Jeffery in a bolt rifle and have no issues with reloads. Obviously it is a function of how close the tolerances on a Blaser are cut. Hopefully other R8 Blaser owners will weigh in.

I would also add that without a break, shooting 570 grain bullets at 2600 fps in a synthetic stocked Blaser (mine is a steel receiver R8 with the Kickstop installed) is going to be unfun not to mention unnecessary. If you try that load with a scope on, keep some Superglue handy.

That was not fun to hear Hope that it will not be the same in every blaser..
What have you shoot in yours? handloaded or factory ammo only?
Yes I know that it would kick alot with a 570grainer at 2600FPS but I am thinking to put a muzzle brake on it. And I would not have any scope on it.

Come an now jeffery owners... I want answers to my questions

Oh I forgat to ask.. MJines.. what weight is it on your R8?

My 10LB Jeffrey shooting 535 grainers at 2450 gets your attention real quick. 2600 with a 570 grain in a lighter rifle.....

Blasers are quite precisely machined, including the chamber. I have heard of a number of people who have experienced feeding difficulty with handloads. I suppose the best method would be to fire a factory round in the chamber, then send the case to Huntington's and have them make custom dies to that exact spec.

"My 10LB Jeffrey shooting 535 grainers at 2450 gets your attention real quick. 2600 with a 570 grain in a lighter rifle..... Eeker

Mac"

I am used to 550grains at 2500 fps so I Think I could handle the recoil with a good muzzle break on top
But the question is still.. is it possible to get 2600FPS with a 570 grainer out of the jeffery?

"Blasers are quite precisely machined, including the chamber. I have heard of a number of people who have experienced feeding difficulty with handloads. I suppose the best method would be to fire a factory round in the chamber, then send the case to Huntington's and have them make custom dies to that exact spec."

It is maybe better to just buy a new CZ 550 safari instead of a Blaser?
Does them feed good "right out of the box" ??

quote:

Originally posted by Overkill from sweden:
But the question is still.. is it possible to get 2600FPS with a 570 grainer out of the jeffery?

Perhaps, but to me the more relevant question is why would anyone want to? A 570 grain bullet at 2200-2300 fps is more than adequate for anything on earth.

"Perhaps, but to me the more relevant question is why would anyone want to?"

Because I like to have real Power when I am in the thick bush hunting bears. And for big bears I Think there is no shoulder fired rifle that is too powerful.

I have been dreaming of a bigger rifle than my .460 wby for years. And now when Swedish NORMA has started to make their high quality cases in the 500 Jeffery and blaser,sako and CZ is making rifles at a price that I could afford my Dream is coming closer
BUT if the .500 jeffery only has the same Power as my .460 wby Then my Dream will fall apart again

A 600 OK handles a 900gr bullet at about 2,250 fps. Enough? :-)

Mike, are your dies leaving the shoulder too far foward or is the base not being resized enough.

The CIP chamber specs may be different than the American die makers are using.

"A 600 OK handles a 900gr bullet at about 2,250 fps. Enough? :-)"

Yes
But I dont Think I could get licence to one here in sweden. The 600 OK is not on the "list of hunting calibers" here in sweden..
The .585 Nyati is on the list.. but it seems impossible to get quality cases for it. So there is only the .500 Jeffe and the 500 A-Square left. I could Always rebarrel my .460 to the 500 a-Square but the jeffery has more case capacity and I want to keep my .460 as it is.

My CZ 550 in 550 Jeffery won't chamber Kynoch ammo but Jamison Brass in 500 Jeffery works just fine. I've never tried the Norma PH ammo ($20 per round is a bit steep for me). Are there two different chamber specifications out there?

chuck375

You got 2550 fps with the 570 barnes tsx right?
Have you tried any 600 grain bullet?
Did you see any pressure signs on the case when you got 2550fps?
you Think 2600 fps with 570 grain is possible if you can handle the recoil?

quote:

Originally posted by N E 450 No2:
Mike, are your dies leaving the shoulder too far foward or is the base not being resized enough.

The CIP chamber specs may be different than the American die makers are using.

How would I tell?

I've found in most cases it is due to the sizer not reaching all the way down, leaving a small "rim" at the base of the case. See if there's any play in your shellholder, and slide a shim under it to bring it up as far as possible.

I will check. Although I bought a brick of Kynoch SPs and another of solids so I am good for a long time.

quote:

Originally posted by Overkill from sweden:
chuck375

You got 2550 fps with the 570 barnes tsx right?
Have you tried any 600 grain bullet?
Did you see any pressure signs on the case when you got 2550fps?
you Think 2600 fps with 570 grain is possible if you can handle the recoil?

I'm sure 2500 fps is not an issue with a slower powder like IMR 4350. I didn't have any pressure signs until I left some rounds out in the sun in 90 degree heat for several hours. Then I had very slight harder than normal extraction issues with 106g H4895. It's way too fast of a powder if you're going for maximum. 103g H4895 is a sweet relatively low recoil load pushing a 570g TSX just over 2300 fps. I never tried any 600g bullets, just the 570g TSX and A-Frames. Both shot very well, the TSX a bit better.

Mike

Will a fired case from the factory ammo, go back into your chamber, before it is resized?

I have an R8 steel receiver in 500 Jeffery. Have been shooting it lately experimenting with loads using
570 and 600 grn woodleighs.
I've got the 570 upto 2350fps and the 600 to 2250 comfortably. Recoil is not a problem so far.
I am building the loads up each week to find max.
I am reloading with NOrma cases and Rcbs dies . All load well in the gun.

The R8 seems to me to be a very strong and robust action in the steel receiver version. I concur with MIke in not shooting the big loads with a scope on!

Cheers

Nick

quote:

Originally posted by Overkill from sweden:
That was not fun to hear Hope that it will not be the same in every blaser..
What have you shoot in yours? handloaded or factory ammo only?
Yes I know that it would kick alot with a 570grainer at 2600FPS but I am thinking to put a muzzle brake on it. And I would not have any scope on it.

Come an now jeffery owners... I want answers to my questions

For me, the purpose of having a bullet fly at 2600 fps is for potential shots over 200 yards where a scope would be very handy.

If the rifle will not have a scope, then it will probably be limited to shots under 150 yards and velocity is much less relevant. You can load down to 2400fps or even 2000fps for a short-range rifle. For 2600fps, I would plan on a scope.

For the record, the 500 AccRel Nyati on a short Rigby case does 2600-2650 with a 450 grain GSC. Yes, it is scoped.

nickh

That was very interesting.. I have sent you a PM. Chek it out

All you other Jeffe owners were are you?
What have been your max loads in your rifle??

To be honest I think you should stay with your 460 Wby and those hot loads which apparently proved safe in your rifle... For bears its WAAAAY overkill anyway... I would be satisfied with a 375 or 416 for ANY bear encounter I might get into on the biggest bears in the world... Those swedish bears are not that large at all and a 375 is actually also quite an overkill...
The 500 Jeff is not an easy chambering to deal with.. difference in dimensions, rebated rim etc etc etc... And to make it all worse you even consider a Blaser rifle... Shit - I wouldnt want that much worries in my life..

Buffalo

But if a new CZ or blaser works and feeds well.. whats the problem?? and if the 500 Jeff can make 2500 FPS with a 600 grainer it will be around 10 % more Power than my .460 and with a larger bullet diamter.

Is it possible to use 750 grain honradya-max bullets in the 500 jeffery? I know they wont fit in the Magazine but as a singel shoot rifle? what velocity? around 2000fps?

The 500 Jeffery is about 6.7% larger in case capacity than the 500 A2.
That will get you about 1.675% higher velocity than the 500 A2.
750-grain Hornady A-Max: If you can do 2200 fps with the 500 A2, then you can do 2237 fps with the 500 Jeffery at same pressure.
Little gain, but that assumes same high pressures and same throat.

The standard C.I.P. 500 Jeffery has zero parallel-sided free-bore. Leade only.

You will have to seat the Hornady A-Max very deeply, and lose any case capacity advantage, and then some, versus the 500 A2 which has 0.4000" of PS free-bore length, plus leade.
Single-shot loading out to C.O.L. of +4.5".

Re-throat the 500 Jeffery and you can gain 37 fps over the 500 A2, by loading singles directly into the chamber.

The 500 A2 really is the most practical power out there,
and the 500 Jeffery is an ugly duckling compared to the swan.

John Buhmiller did his .510/378 Weatherby in the 1950's long before others, along with his .458/378 Weatherby, and .475/378 Weatherby, before there was a 460 Weatherby.

There was a "500 Weatherby" that never joined the factory line, etc.

J. D. Jones "50 Peacekeeper" copycat of the 500 A2 claimed 2300 fps with 750-grainers in a 23" barrel.
I wonder about the pressure on that one. Must be a "max load."

Thank you RIP for very good information... it was very interesting for me. Thank you...

quote:

Originally posted by Overkill from sweden:
Thank you RIP for very good information... it was very interesting for me. Thank you...

Overkill from Sweden,
Sir,
It was my pleasure, you are welcome.
You are obviously a gentleman and a scholar,
and not overly emotionally invested in the 500 Jeffery,
unlike some other folks around here.

quote:

The 500 A2 really is the most practical power out there,
and the 500 Jeffery is an ugly duckling compared to the swan.

If the 500 A-square is on the list of approved hunting rounds and if wildcats are blocked, then the 500 A2 would be an ideal choice.

When I considered getting a .510" I wanted a buffalo thumper that would also be usable for other game out to 300 yards.

I came up with 2600 fps as a functional compromise, with bullet weight negotiable. The GSC 450 grain all-copper HV meets expectations as does the CEB .510 tipped-350 grain.

The 500A2 and its beltless sister the "500 Mbogo" were good cartridges for such loads but both would require magnum length actions and slightly heavier rifles. They could be handloaded quite above the nominal factory ballistics of the 500 Jeffrey. However, the ballistics necessary for 2600fps with the 450 grain GSC bullet were down in the 6500-7000 ftlb range. Those ballistics could also be delivered in the 'standard length action' 500 Accurate Reloading. For efficiency and elegance, I now think that the 500 Acc Rel (with the .25" throat of the Nyati version) is about ideal for a .510" projectile. It duplicates the Jeffery factory levels and does so in a shorter, handier package. In June I hope to shoot it with its new replacement stock. A second "barrel recoil lug" on a 7000ftlb rifle seems a good idea.

Back to your search, it would seem that the 500A2 would give you a nice pairing with the 460 Weatherby.

quote:

Originally posted by RIP:
The 500 A2 really is the most practical power out there,
and the 500 Jeffery is an ugly duckling compared to the swan.

Hater! lol

But you can still get out a Little more powerfron the 500 jeffe
And there are factory rifles made.. and the most important thing is that norma makes cases for it.

Did not know you were planning on using a break. So I guess push them as fast as you want. But the other question how big are these bears?

quote:

Originally posted by Overkill from sweden:
I am seriously thinking about to order a new Blaser R8 in the 500 Jeffey in the near future.
So I want to get at least 2500 fps wth a 600 grainer and and 2600 fps with a 570 grainer.. is this possible in the storng blaser action? with the strong quality cases from norma?
The blaser has a 24" barrel if I remeber right.
If this is not possible then I see no need to buy one.. when my .460WBY gets a 550grainer to 2500 fps.
And all talk about pressure.. why cant you load a 500 jeffery to the same pressure as a 500 a-Square in a storng rifle with high quality brass? I dont really get it.
I hope for many wise and good answers
So let´s talk about the 500 jeffery and clear out Everything about it one´s and for all.
And sorry for my bad English.
//Overkill from sweden

I have a CZ in 500 Jeffery, it has a 23" barrel and with 128 grains of H4350 in a once fired Jamison case neck sized only, I can seat a 600 grain Woodleigh just to the cannulure (its compressed) and I get 2400 fps + or -20 fps. The 535 grainers reach 2600fps out of my 23" barrel. That is MAX on both loads in a 500J with a 23" tube. A longer barrel would reach your goal with no problem.

I Think the blaser as a 24" barrel.. will that 1" help much?

20 fps typically at those velocities

quote:

Originally posted by Biebs:
Blasers are quite precisely machined, including the chamber. I have heard of a number of people who have experienced feeding difficulty with handloads. I suppose the best method would be to fire a factory round in the chamber, then send the case to Huntington's and have them make custom dies to that exact spec.

Great idea!

I would hesitate to hunt with the available, 570 and 600 gr. 500 caliber bullets at 2600 FPS, as most, if not all, of these bullets are designed to expand properly at 2300 to 2350 FPS. I only used Woodleighs and I got best penetration and expansion at 2250 to 2300 FPS in mine, but that was some time ago, things may have changed..At any rate I didn't change, I went back to my 404 and 416 as I couldn't tell any difference in how it killed, and didn't care for the aftershocks!