Wednesday, October 30, 2013

8x56R load data

going for my black belt in google-FU I came across a few threads where some shooters developed their own loads because the data out there(notably lee data) is based on 8x57 mauser and often too anemic and causes problems so they went and developed their 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. so here it is.

8x56R Hungarian.
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 (supposedly equivalent to modern factory loads)

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 (supposedly equivalent to modern factory loads)

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.

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