Reloading Data Wanted for .256 Win Mag

[pertnear]

I went to a garage sale & I bought a box of handloaded .256 Win Mag. I won't shoot someone else's garage sale reloads, but the factory Win brass alone was worth the price I paid! Scribbled on the box was 75gr H & 4.9gr of TiteGroup. I looked around in my manuals & I couldn't find any data for TiteGroup in the .256. Curiosity has the best of me. Has anyone tried it or have a line on some load data for TG in a .256?

TIA

[Kosh75287]

It sounds like a very mild load. It may not even develop 1000 f/s, depending on the barrel length from which it is (would have been) launched.
Do you need other data for the .256? My older Lyman Manual may have it.

[P Flados]

Quickload (QL) says that these loads are mid power "plinkers", 1400 fps from a 10" gun.

And QL says there is no powder available that will go over SAAMI limits with a 5 gr charge and a 75 gr bullet.

If shooting in a gun with good margins (Contender for example), I would be tempted to pull a couple, confirm everything is consistent with the labelling and then shoot one or two. Then examine the cases and if "normal", then shoot the rest. The 256 Win will stretch primer pockets before damaging the gun.

On the flip side, the stated charge is below 50% fill. A double charge is possible. A double charge of TG would be bad news. Running each load on a scale and doing your disassembly on the heaviest couple would reduce your risk of a stray double charge.

Cartridge          : .256 Win. Mag.
Bullet             : .257, 75, Speer FN 1237
Useable Case Capaci: 18.209 grain H2O = 1.182 cm³
Cartridge O.A.L. L6: 1.590 inch = 40.39 mm
Barrel Length      : 10.0 inch = 254.0 mm
Powder             : Hodgdon TiteGroup

CAUTION: Figures exceed maximum and minimum recommended loads !

Step    Fill. Charge   Vel.  Energy   Pmax   Pmuz  Prop.Burnt B_Time
 %       %    Grains   fps   ft.lbs    psi    psi      %        ms

-33.3   29     4.00   1250     260   19689   2514    100.0    1.025
-30.0   31     4.20   1284     275   21208   2627    100.0    0.990
-26.7   32     4.40   1318     289   22769   2739    100.0    0.959
-23.3   34     4.60   1350     304   24371   2851    100.0    0.930
-20.0   35     4.80   1382     318   26015   2962    100.0    0.903
-16.7   37     5.00   1414     333   27702   3072    100.0    0.879
-13.3   38     5.20   1444     347   29431   3182    100.0    0.856
-10.0   39     5.40   1474     362   31203   3291    100.0    0.834
-06.7   41     5.60   1504     377   33019   3400    100.0    0.814
-03.3   42     5.80   1533     391   34878   3508    100.0    0.796
+00.0   44     6.00   1561     406   36782   3616    100.0    0.778
+03.3   45     6.20   1589     421   38731   3723    100.0    0.760
+06.7   47     6.40   1617     435   40726   3829    100.0    0.743
+10.0   48     6.60   1644     450   42767   3935    100.0    0.727
+13.3   50     6.80   1671     465   44855   4040    100.0    0.711  ! Near Maximum !
+16.7   51     7.00   1697     480   46992   4145    100.0    0.696  ! Near Maximum !

[pertnear]

Thanks guys for the good info.