8x58 R for rolling block loads

tbrwlf

tbrwlf

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Need your help guys.

I normally load 150 gr bullets for my 8x58Rs. But a friend has asked me to load some 195 gr projectiles for him to shoot in his. His dies won't be available for months.

Normally I would work off the 30-40 Krag tables and work up to a comfortable load. But there is no 195 gr in the table. 180, 200, 220.

Does anyone load a 195 and have a load they would share? Or a 200?

I need a starting point.

Powder is not a problem as I have dozens to choose from.

Any help would be appreciated.
 
From Cartridges of the World 11th Edition............8x58R Danish Krag 196gr bullet /IMR 4895/54gr/2630fps/3020 ft /lbs

198gr bullet/54.5gr/IMR 4895/2740fps/3310 ft /lbs...........Harold
 
MBOGO:

Unfortunately COW is a joke for this round.
This has been covered on many sites.
The Dutchman is an authority on the round and has proven COW can't be trusted on this round.
Be very careful about taking them as a good resource for this round.

Vagrant:

I have nothing but 30-40 Krag spec. I was hoping for someone with experience on 8x58 with this bullet weight. But you are right I can start with the 200 30-40 Krag specs.
 
mbogo3 said:
From Cartridges of the World 11th Edition............8x58R Danish Krag 196gr bullet /IMR 4895/54gr/2630fps/3020 ft /lbs

198gr bullet/54.5gr/IMR 4895/2740fps/3310 ft /lbs...........Harold
Click to expand...

Not in a Rolling Block you don't!

What you can do is use starting 8X57 loads, which in the much larger 8X58RD cartridge produce pressures that the Rolling block can handle, i.e. ~28K psi. In the case of a 200 gr bullet, you could use up to 39.0 grs of IMR4895. I wouldn't use powders much slower than 4895 though, e.g. 4350. H4198 is a good choice.
 
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I feel like I should have better info as I've had one of these rolling blocks for several years.

Only loaded black powder and cast bullets with disappointing results and haven't gotten back to it.Interested to see what people recommend.
 
tbrwlf said:
Andy:
Have you tried that?

It says on Hodgdon's website it will produce 36K to 49K pressures in 8x57. And 45.4 gr of H4895 is their max load.
Click to expand...

Thanks for keeping me honest! I modified my post to reflect what I've posted elsewhere such as Gunboards (alongside "Dutchman"). You can use 8X57 starting loads and remain below 28K PSI. If you're getting a MV of over 2200 fps with less than 45.0 grs of any powder, you're likely running over 28K psi.
 
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I had no idea ,just relaying data from a manual that said it was safe.Thanx for catching that..........I won't take that book as the Gospel any more.Harold
 
tbrwlf said:
Need your help guys.

I normally load 150 gr bullets for my 8x58Rs. But a friend has asked me to load some 195 gr projectiles for him to shoot in his. His dies won't be available for months.

Normally I would work off the 30-40 Krag tables and work up to a comfortable load. But there is no 195 gr in the table. 180, 200, 220.

Does anyone load a 195 and have a load they would share? Or a 200?

I need a starting point.

Powder is not a problem as I have dozens to choose from.

Any help would be appreciated.
Click to expand...

Use the 200gr load data.

And do be careful with any numbers you get from COTW, for the most part it is Ok but there are enough documented errors that you should double check any data before you use it.
 
mbogo3 said:
From Cartridges of the World 11th Edition............8x58R Danish Krag 196gr bullet /IMR 4895/54gr/2630fps/3020 ft /lbs

198gr bullet/54.5gr/IMR 4895/2740fps/3310 ft /lbs...........Harold
Click to expand...

DO NOT USE THIS LOAD! it is dangerously overpressure for rolling blocks and Krags.
CotW really blew it with this one
 
You are right there is no North American load data.

But he does strongly recommend that loads not exceed 28 K PSI.

That is why using 30-40 Krag load data is a good start.
 
So re-barrelling one to a 45-70 would be a WOT ? I realize there are 3 strength levels for that round depending on the gun it sits in.....or 50-70 Govt.....Harold
 
mbogo3 said:
So re-barrelling one to a 45-70 would be a WOT ? I realize there are 3 strength levels for that round depending on the gun it sits in.....or 50-70 Govt.....Harold
Click to expand...

Why would it be a waste of time?

Load the 45-70 to appropriate levels for a BP firearm, you'll be fine. Even better, use BP.

No changes needed to the extractor as the rim diameter is close enough.

It isn't a Ruger Number 1, but it's fine with the appropriate load levels.

Cheers
Trev
 
I read the Swedish made RB's were stronger than the Rem made ones...........any truth to this? I'm interested in building one in 45-70 or 50-70 Govt.......Harold
 
mbogo3 said:
I read the Swedish made RB's were stronger than the Rem made ones...........any truth to this? I'm interested in building one in 45-70 or 50-70 Govt.......Harold
Click to expand...

iirc, Some of the Swedes were made by Husqvarna and many 12.7x44R Swede Rollers were able to chamber and use 50-70 rounds with no modification, most needed the rims reduced a bit.

It's been quite a few years since my rolling block phase so I may be recalling incorrectly... :redface:
 
I use to shoot one rebarreled in 45-70. The person who owns it shoots factory loads in it. I do prefer keeping it in 12.7x44R using .348 Win brass and 0.512" 360 grains bullets with either BP or smokeless and it's close enough to the 50-70....
 
BrotherRockeye said:
iirc, Some of the Swedes were made by Husqvarna and many 12.7x44R Swede Rollers were able to chamber and use 50-70 rounds with no modification, most needed the rims reduced a bit.

It's been quite a few years since my rolling block phase so I may be recalling incorrectly... :redface:
Click to expand...

The Swedes were very proud of their steel back in those days, they also said their M96 mausers were stronger than the German made M96 mausers. I wouldn't count on the Swedish roller to be stronger but it would be at least as good as the Remington.
 
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