Reloading The 7.5x55 Swiss
Tom Line
Looking for the best load to duplicate ballistics and accuracy of the
7.5x55 Swiss used in the K31 Swiss Rifles.
--
Tom Line
tl...@iglou.com
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Edward F. Arnold
for loads:
168gr. Sierra MatchKing or Hornaday A-Max
42gr. of IMR-4895, or 45gr. of IMR-4064
Both should give around the same 2550fps. velocity of the original Swiss
1911 load. Accuracy is going to depend on you working up the load for your
particular rifle.
IMHO
Ed Arnold
endofwork
functional reload, I believe (someone else may correct me on this) using
6.5X55 mauser brass with the case full lenth resized and standard .308
bullets works. Play around with a few powder loads till you get one that
works well.
Sorry if I can't be of more help.
Jon
Tom Line <tl...@shell1.iglou.com> wrote in message
news:9a2ahr$h8p$1...@xring.cs.umd.edu...
> ...
JOHN GARAND
WROTE:
#In terms of duplication, I couldn't tell you... but if you are looking for a
#functional reload, I believe (someone else may correct me on this) using
#6.5X55 mauser brass with the case full lenth resized and standard .308
#bullets works. Play around with a few powder loads till you get one that
#works well.
#
#Sorry if I can't be of more help.
I know the 6.5x55mm (though undersized) can be adapted to the 7.5x54mm
MAS (French), but I'm not sure this case would work for the 7.5x55mm
Swiss. I miked a _fired_ 7.5x54mm French production case head at
0.489" and body in front of the head at 0.4855". One manual I have
shows the 7.5x55mm at 0.498" case head diameter and a body diameter in
front of the head of 0.491" (unfired dimensions). The 6.5x55mm is
known to be undersized for converting to the French round (0.479" with
the case body ahead of the base measuring 0.477" unfired), with advice
to use the stronger Norma or Lapua cases if intended for use in the
semi-auto rifles or for generally increased case life. Given that,
and the fact that the 7.5x55mm unfired case body ahead of the base is
apparently 0.0055 larger than the 7.5x54mm after firing, I would be
extremely cautious about using the 6.5x55mm for the apparently
larger Swiss case. Particularly when the correct Norma 7.5x55mm brass
is readily (though not inexpensively) available.
Dr. Smith
with a .308 expander. The result leaves juts the rim a little undersized,
and a bit thinner. I think, just by running .284 thrugh the 7.5x55 full
lenght sizing dies (inside necks lubed for first sizing, cases outside lubed
as normal) will do the trick.
6.5 Swedish brass is inappropriate for the 7.5 Swiss cartridge.
If you have trouble with shoulders collapsing from the expander ball, you
might try F.L. size without the ball, (you must size the case first, or it
will not chamber) and blow out cases with a light charge of slow pistol
powder (6-8gr.) a tissue wad, and a case filled with quick-grits, top off
with a thin wad of bullet lube. Fire form in your rifle. then resize as
normal.
Refer to Dr.Ken Howells "Custom Forming Cartridges"
also try http://www.swissrifles.com/ammo/
http://w3.one.net/~melchar/75swiss/index.html
I haven't yet started reloading this round, but this is what I could find
out for myself. The case forming technique described I have used in forming
.32 Rem cases from .30 Rem brass. It is a lot of work, but if the parent
case is scarce to start with, you can'r afford to collapse any shoulders at
all.
Hope this helps, and clears up some of the confusion surrounding the 7.5x55
Swiss.
--
Craig Smith
Howell, MI
NRA Life
Second Amendment Foundation
Capitol City Rifle Club
Howell Gun Club
Michael Adams
"JOHN GARAND" <GARAND_...@HOTMAIL.COM> wrote in message
news:9a8a4m$2ck$1...@xring.cs.umd.edu...
# ON 31 Mar 2001 12:29:01 -0500, "endofwork" <endo...@email.msn.com>
# WROTE:
#
# #In terms of duplication, I couldn't tell you... but if you are looking
for a
# #functional reload, I believe (someone else may correct me on this) using
# #6.5X55 mauser brass with the case full lenth resized and standard .308
# #bullets works. Play around with a few powder loads till you get one that
# #works well.
# #
# #Sorry if I can't be of more help.
# I know the 6.5x55mm (though undersized) can be adapted to the 7.5x54mm
# MAS (French), but I'm not sure this case would work for the 7.5x55mm
# Swiss
It can be formed and used in 7.5X55 Swiss rifle. After losing half the brass
to crushing during attempts to expand the case mouth from 6.5 to 7.62mm, I
tried fire forming the brass. I used a charge of Bullseye powder under corn
meal held in place with a piece of crayon. The smell ain't bad and the case
is formed to the chamber, then reload per instructions in loading manual(s).
I know I did not say how much Bullseye - what works for me may not be safe
for any one else's rifle.
Michael Adams
Texas
Michael Adams
"Michael Adams" <dra...@hot.rr.com> wrote in message
news:9abf08$90u$1...@xring.cs.umd.edu...
#
#
# It can be formed and used in 7.5X55 Swiss rifle. > Michael Adams
# Texas
#
#
Correction... Dr Smith is correct and I erred. I was actually using .284
Winchester and NOT 6.5X55 to make 7.5X55 Swiss ammunition.
JOHN GARAND
WROTE:
#
#"Michael Adams" <dra...@hot.rr.com> wrote in message
#news:9abf08$90u$1...@xring.cs.umd.edu...
##
##
## It can be formed and used in 7.5X55 Swiss rifle. > Michael Adams
## Texas
##
##
#Correction... Dr Smith is correct and I erred. I was actually using .284
#Winchester and NOT 6.5X55 to make 7.5X55 Swiss ammunition.
Thanks, I believed the 6.5 to be "stretched" a bit too far. I was
pondering how to say "Don't try this at home". :-))
Dr. Smith
JOHN GARAND
WROTE:
#Not only that but us 6.5x55 bras is undersized from the real deal as well.
True, which is why I use Lapua for the 7.5 MAS (though I am informed
that US brands will "hold up" to use in a MAS 1936 bolt gun).