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.