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8x58rd
- Thread starter timgd
- Start date
I'm looking for a load using imr4895 suitable for use in a Carl Gustaf rolling block rifle,I found one using H4895 but i'm not sure about the difference between that and the imr powder. Does it makes a major difference?
When Winchester, IMR and Hodgdon started leaving the same factory reloaders I know claimed they would no longer use IMR if the powder did not come in a metal can. Hodgdon said they determine there were only two companies that made metal cans so they were going with plastic. Other reloaders I know said they use IMR or nothing meaning if Hodgdon sold IMR and Hodgdon with the same load data they would switch brands.
I do not take liberties with load data.
F. Guffey
Thanks for your reply, I understand your point about not about not mixing components / powders. My problem is that I can find no published data for this cartridge. Then you add in that I want to use it in a rifle built in 1871,re barreled in 95. If anyone can point me in the right direction it would be much appreciated.
thanks for your input
thanks for your input
You might try Cast Bullets forum or see if there is a Carl Gustof form/group.
You have to be deep into the gun to know even if the IMR would be safe and with what bullets etc.
Not a gun most know anything about, let alone advice on that.
It could be the IMR is not a good powder either.
This is a start I think.
http://dutchman.rebooty.com/GB8x58RD.html
A quick read indicates the IMR 4895 was a dangerous substitute (in the grains it was used in).
You can see why this is such an iffy subject.
You have to be deep into the gun to know even if the IMR would be safe and with what bullets etc.
Not a gun most know anything about, let alone advice on that.
It could be the IMR is not a good powder either.
This is a start I think.
http://dutchman.rebooty.com/GB8x58RD.html
A quick read indicates the IMR 4895 was a dangerous substitute (in the grains it was used in).
You can see why this is such an iffy subject.
Last edited:
RC20,thanks for your reply. I have read Dutchmans post 2 or 3 times since I got the rifle in Dec. It has kept me from doing anything stupid but hasn't helped with getting started. I have read every thing I could find on the 8x58Rd but as you said there isn't much out there. I am a novice at reloading and can't find any place to use as a starting point. As for IMR4895 it is simply what I have on hand and it has become a pain in the butt to buy anything for reloading or even ammo since Jan.1 here in Ca. I bought brass and bullets from Buffalo Arms before the new year so I have that covered.Any help will be much appreciated.
Tim
Tim
Other than the link, I sure can't help you. Its a very rare cartridge. That link was found looking at the gun and none to speak of on the cartridge itself.
Unless I have some good data, couple of books, I don't put out information.
Quick Load if someone will run it for you might give you some inkling as there is some pressure information in there.
You also get into too large a case and not being able to load powder to level needed for a good uniform no spiking pressure. Too little of the wrong powder can be highly erratic.
H4895 is more tolerant of low loads, but no idea how far that goes for that cartridge.
Good luck, other than the generalities its a seriously rare bird information wise.
Unless I have some good data, couple of books, I don't put out information.
Quick Load if someone will run it for you might give you some inkling as there is some pressure information in there.
You also get into too large a case and not being able to load powder to level needed for a good uniform no spiking pressure. Too little of the wrong powder can be highly erratic.
H4895 is more tolerant of low loads, but no idea how far that goes for that cartridge.
Good luck, other than the generalities its a seriously rare bird information wise.
I read something about Hogdon H4895 and the 60%rule, 60% of the max published load being ok for a min. load. Then someone made the same statement about IMR 4895 if you changed the max published load to max fill load ,IE fill to 60% of the level of the bottom of what ever bullet you are using. I am not sure this info buys me anything or is just an interesting piece of trivia, if true. The hogdon info came from their site,the IMR statement is just here/say.
Still Looking
Still Looking
ligonierbill
New member
I will not recommend a load, but I will share some information from Quickload. The 8x58RD has a MAP of 1,800 bar (26,107 psi) under CIP. The 8x58RD was loaded with smokeless later in it's long service life, but I'd for sure keep looking until I found some actual data for the round. Be aware that there is another 8x58R cartridge that has a higher MAP. Yours is the Danish Krag.
Personally, I would have a pro check it out. If it's OK, I'd load black or a blackpowder substitute. Alliant Black MZ is advertised as equivalent to FFg, and it works well for me in a number of old cartridge guns. Read up on blackpowder cartridges if you are not familiar. It's a different beast than smokeless.
Personally, I would have a pro check it out. If it's OK, I'd load black or a blackpowder substitute. Alliant Black MZ is advertised as equivalent to FFg, and it works well for me in a number of old cartridge guns. Read up on blackpowder cartridges if you are not familiar. It's a different beast than smokeless.
Ligonierbill,thanks for your reply. I think that the pressures you listed are indeed for the Danish Krag rifle but may still be excessive for the rolling block action.That is why I am looking for a starting load suitable for a r/b rifle.
I have both black powder and pyrodex but the only bp cartridges I have loaded ar 45-70 for my trapdoor rifle. 15 rds that I have not been able to test yet because our club range has been shut down for lead clean up and the county is stone walling the permits for reopening. Not the 1st range they have put out of business this way.
I have both black powder and pyrodex but the only bp cartridges I have loaded ar 45-70 for my trapdoor rifle. 15 rds that I have not been able to test yet because our club range has been shut down for lead clean up and the county is stone walling the permits for reopening. Not the 1st range they have put out of business this way.
"...the difference between that and the IMR powder..." Burn rate is different. It's very close but not the same. A 200 grain bullet out of an 8 x 57 uses .4 grains less of the IMR for 30 FPS less velocity with Max loads. Still not interchangeable.
Down near the bottom there's some old IMR4895 data for a 196 grain jacketed bullet.
http://dutchman.rebooty.com/GB8x58RD.html
Down near the bottom there's some old IMR4895 data for a 196 grain jacketed bullet.
http://dutchman.rebooty.com/GB8x58RD.html
Thanks for the link,I had already seen that one and I was thinking that was the data from COTW that Dutchman was warning about. It was also what I was considering using as a basis for the 60% max fill load if I can't come up with something that has already been found to be safe.
Thanks Agin
Tim
Thanks Agin
Tim