.25 Gibbs load data
asm
I need load data for a 25 Gibbs.
elcoy...@aol.com
**asm6643 wrote: "I need load data for a 25 Gibbs."**
Ackley (volume II, page 154) lists only the following:
63 gr. 4831 for 3800 fps w/ 87 gr. bullet
63 gr. 4831 for 3525 fps w/ 100 gr. bullet
Whether IMR 4831 or Hodgdon's H4831 was used is not specified.
The Gibbs cartridges are basically blown-out, sharp-shouldered,
short-necked (i.e. shoulder moved forward) .30-'06 cases sized to the
proper neck diameter. Donnelly (The Handloaders Manual of Cartridge
Conversions, 1987, Stoeger Books; page 200) lists a case capacity of 74.69
gr. of water for the .25 Gibbs, while the .25-06 Remington (page 209) is
cited as having a case capacity of 65.04 gr. of water, and the .257
Weatherby (page 243) is listed with a case capacity of 85.63 gr. of water.
Since the .25 Gibbs fits pretty much squarely in the middle of the other
two cartridges, that should give you some kind of a bracket for working up
loads. Just remember to be real careful not to use too light of a charge
with the slow burning powders.
Good luck.
el coyotero
fl...@alaska.net
asm wrote:
#
# I need load data for a 25 Gibbs.
Try page 26 in the November/December 1989 issue of Handloader magazine. Lots of tested
loads. Wolfe Publishing Company - (602) 445-7810. or http:\\www.alloutdoors.com
Gary Anglin
asm...@acs.tamu.edu (asm) wrote:
#I need load data for a 25 Gibbs.
Your best bet is to order the book on Rocky Gibbs from Wolfe
Publishing.
fl...@alaska.net
elcoy...@aol.com wrote:
#
# 63 gr. 4831 for 3525 fps w/ 100 gr. bullet...
# Whether IMR 4831 or Hodgdon's H4831 was used is not specified.
It's pretty safe to assume that Ackley meant H4831 when he refered to 4831 in his books.
IMR 4831 was not introduced until long after his books first saw print. Still, it would
never be too safe to assume that IMR 4831 was always intended when only the numbers 4831
are used. If an author meant H4831 and you used that powder, you probably would not get
into trouble. If he meant IMP 4831 and you used H4831, no problem as H4831 is
considerably slower than IMR 4831. Use IMR 4831 with H4831 data and you can stick a
bolt real quick.
ceh...@aol.com
P. O. Ackley's two volume set of relaoding books has data on Gibbs
cartridges; or start low on .25-'06 and work up until the rifle shoots
weel and you have no trouble lifting the bolt. H-4831 powder or similar
burning rate is the better choice for this cartridge
rickb...@gmail.com
# I need load data for a 25 Gibbs.
Mine is blown right out with a 40 degree shoulder and short neck. I shoot 67 GR. of RL 22 with 100 GR. Speer BT.
peterw...@hotmail.com
# asm...@acs.tamu.edu (asm) wrote:
#
# #I need load data for a 25 Gibbs.
#
# Your best bet is to order the book on Rocky Gibbs from Wolfe
# Publishing.
Was it Gibbs that did some work on flash-tube ignition; i.e. an
extension tube from the primer pocket to ignite the powder in
the front part of the cartridge case first?
Peter Wezeman
anti-social Darwinist
mi...@rucls.net
# On Tuesday, November 12, 1996 at 1:00:00 AM UTC-7, asm wrote:
# # I need load data for a 25 Gibbs.
#
# Mine is blown right out with a 40 degree shoulder and short neck. I
# shoot 67 GR. of RL 22 with 100 GR. Speer BT.
Sir, A true Gibbs has a 35 degree shoulder
mi...@rucls.net
# I need load data for a 25 Gibbs.
Here`s one way to fire form a 25 Gibbs cartridge. Start with 30-06
cases, use a 270 win. Full length Die. Slowly adjust the die down to resize a
false neck to about 250 th. In length .Then use a 25-06 rem. (Again full length
die to help keep the case neck in alignment) Adjust the 25 die down to the
250 th .false neck length. This will create a bulge for the head spacing of the
case. Doing this will help keep the neck in alignment with the body of the case.
Next prime the cases & use a good stout load of fast burning pistol power, around
10 to 13 grains of Alliant 2400 or whatever ya have. Next drop in a small piece
of tissue paper to keep the powder in place, then fill the case about 80 % full
of cream of wheat. Next fill the remainder of the case with more tissue paper &
use something to help push it down, packing it as tight as possible. Sometimes I add
wax to help seal off the case mouth. Then apply a thin coat of oil to the case
neck & shoulder area. If ya used a good stout load of pistol powder & packed everything
good an tight? you`ll blow the case out & have an almost sharp 35 degree shoulder
angle . Then anneal your cases, use your Gibbs die to resize & trim to length.
Lastly use a 25 caliber outside neck turner to insure the wall thickness is correct.
Thick necks can create poor bullet release, causing high pressure spikes & poor
alignment between bullet & rifle bore. Then load a 25 cal. Bullet seated out tight
to the lands, with a moderately light powder load to complete the fire forming of
a Gibbs cartridge. Always start with newer brass & always work your loads up
slowly & safely. Rocky Gibbs once commented a Gibbs rifle with a longer barrel,
makes a Weatherby with a short barrel, just another rifle & By God he was right.