8x56R loads anyone?


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tahunua001
June 22, 2013, 09:44 PM
hello all,
yet again I must ask for your input while giving little back in return.
in preparation for buying a M95 I have started putting together everything I need to feed it. I have 100 PPU casings which I have just sized/de-burred and 100 205gr spirepoints and 58(got in a lot deal a while back) 210gr soft points. I also have about a half dozen en blocs so I should be good to go to buy one hopefully be early this fall.

however I need load data. the data that comes with the lee reloading dies is pretty well worthless as almost everything 200gr and up calls for accurate which I do not have and is not carried by most of my LGS in much capacity. I have been able to get some data from an issue of handloader magazine from last summer which is great because it uses two powders I have and like, varget and IMR4064. however the only loads listed are equavalents to hornady factory ammo and the author averaged about 4 MOA with both loads.

does anyone have any accurate load data for this cartridge either involving varget, IMR 3031 or 4064 in 200-210gr or quiet, light recoil, trail boss for cast loads?

as always I greatly apreciate any advice given.

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highlander 5
June 22, 2013, 10:20 PM
Is this the 8x56R Hungarian or the 8x56R Kropatchek? If it's the Hungarian Cartridge Conversions by Donnelly has a load using a 205 gr bullet with 45 gr of IMR3031. The brass used for this load was reformed 7.62x54R so I have no idea if the cases have the same internal capacities.

tahunua001
June 23, 2013, 12:22 AM
it's 8x56R hungarian, designed for the steyr model 1895.

any idea what the muzzle velocity of that 3031 load is and whether the test rifle had the 19.5 inch or 30 inch barrel?

john wall
June 23, 2013, 12:36 AM
To keep pressures down, a near case full of very slow powder like 4350 or 4831 will give good speed with low pressures, a good thing for an old rifle and also for brass.

tahunua001
June 23, 2013, 01:04 AM
I have an abundance of 4831 but all data I've seen calls for the SC or whatever the special stuff is, I just can't get the powder weights into the case that the recipes call for. going for my black belt in google-FU I came across a thread where a person developed their own loads because the data out there is based on 8 mauser and often too anemic and causes problems so he went and developed his own. I paired that data along with the data from my handloader MG and added a couple lighter loads due to something looking off with the IMR 3031 data and made a pseudo half-assed reloading sheet for 8x56R. I'll post it after a few once overs.

tahunua001
June 23, 2013, 01:11 AM
8x56R loads.
Bullet diameter. 329-330
COAL 3.012"
Test barrel 19.5"

1938 nazi marked surplus ammo 208gr FMJ(2337-2400 fps)

Buffalo Arms 150GR Spire Point(329)
PWDR -------weight----FPS(MUZZLE)------SD(where applicable)

IMR 4064----44.0------2150

IMR 4895----46.0------2252

IMR 3031----44.0------- ? (added due to excessive velocity of existing data)
-------------47.0 -----2489(higher than recommended max)

Varget-------46.0-----2168





Grafs/Hornady 205GR Spire Point(330)
PWDR------weight ----FPS(MUZZLE)----SD(where applicable)

IMR 4064----44.0-----2083
-------------47.0------2256-------------34

IMR 4895----45.9------2168

IMR 3031----44.0------ ? (added due to excessive velocity of existing data)
-------------47.0-----2355(higher than recommended MAX)


Varget-------46.0-----2155
--------------49.0-----2268------------56

if anyone has some data that can fill some of the gaps in this list please feel free to post so I can get it as detailed as possible, heck maybe we can submit it to Hogdon and get it published.

I've noticed that in most of the manuals I've looked at a lot of the cartridges that have both 4064 and 3031 data call for less 3031 to get the same velocity which is why I am perplexed as to why the 3031 had the hottest loads, hence the addition of a lighter load with an unknown velocity. if anyone is willing and able to test that load with a chrono and give their .02 that would be great.

KansasSasquatch
June 23, 2013, 03:42 AM
Well, this page http://www.loaddata.com/members/search_detail.cfm?MetallicID=633 seems a little old but it might help. Also calling Hodgdon on Monday might not be a bad idea. They don't have any data listed for that caliber but that doesn't mean they haven't done some testing for it.

NCsmitty
June 23, 2013, 12:23 PM
Reloadersnest site has some unverified loads listed, and should be used only for reference to other data that you have acquired.
I'm also in favor of using the slower powders to keep pressures down in these older rifles. IMR4064 or Varget would be my choice, as it's my opinion that the faster burning IMR3031 may spike pressures getting that 205gr bullet moving. Remember, we are dealing with turn of the century metallurgy.

http://www.reloadersnest.com/frontpage.asp?CaliberID=533


NCsmitty

tahunua001
June 23, 2013, 01:34 PM
I'm inclined to agree with you guys on the slower powder. I have 4064 but not a lot of it and prefer to use it for heavier loads in my 6.5 jap rifle. I have oodles of varget so if I can get some fairly accurate loads that call for that then I'll be all set though I'm sure the ones that mimic factory loads are probably going to be the best I can get. I have noticed that 3031 seems better suited to lighter bullets than heavy so I might not do much with that other than chronographing and seeing if my 44 gr mixes I added are still too high or drop too low.

it'd be nice to get some trail boss data for cast bullets though, low recoil and low report make Tahunua001 a happy shooter :D

NCsmitty
June 23, 2013, 02:58 PM
Varget should work even better for you then, being that it's slower burning than IMR4064. It's also not air temperature sensitive like IMR4064.

Trailboss should be a great choice for plinking loads. The site has the simple formula for producing easy shooting loads with either cast or jacketed in rifle calibers.

http://www.imrpowder.com/PDF/Trail-Boss-data.pdf


NCsmitty

tahunua001
June 23, 2013, 03:18 PM
hmm... 70% of a full cartridge casing sounds like an awful lot. I just did a number of 30-06 loads using 12grs of trailboss. I have a hard time imagining that's 70% of a casing but then again I'm still fairly new to reloading.

Kernel
June 23, 2013, 03:57 PM
12 grs of Trailboss will fill a .30-06 about 60% full. That's "over flow" volume, no bullet seated. Seat a bullet in there and you're really not far off from a 70% load density. It's a vey "fluffy" powder.

tahunua001
June 23, 2013, 04:04 PM
hmm... ok then I'll have to try that with a 56R casing then, thanks for the link.

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