Winchester Super X 38-55 255 gr soft point MV 1340 fps
ME 986 FP
This is very well made ammo.
weight varies from 141 to 143 grains. That is =/- 0.7 % from
Length varies from .005 to .010 les than
maximum and head diameter .003 to .006 less than maximum.
Wall thickness is spectacularly uniform ranging from .08 to
.09 around the mouth of a single case and the same across ten
They are loaded to very low pressure.
Some of the primers are actually concave from the blow of the
firing pin and none of them show any pressure signs at all. The
pressure is not great enough to burn all the powder. Powder
falls out of the case and into the action when ejecting the
spent shell casing
In two out of twenty, powder remained
in the chamber after firing and became embedded in the wall of
the next round fired. This does no harm but I would expect them
to use a powder better suited to the cartridge / load.
fired these in a brand new Winchester Ballard 1885. After
sighting in I had just five rounds left and they went into a
four inch circle at 50 yards.
I am sure groups will
improve as I become used to the tang sight. ( There is no way I
am going to mount a scope on this rifle. ) I will never really
know its real accuracy potential.