240 gibbs

[tooth doc]

recently acquired a beautifull early 50's mauser target rifle in 250 gibbs. I question where to leave alone or rechamber to something newr and perhaps easier to feed. any insight appreciated. thanks in advance for your input!

 

[tooth doc]

recently acquired a beautifull early 50's mauser target rifle in 250 gibbs. I question where to leave alone or rechamber to something newr and perhaps easier to feed. any insight appreciated. thanks in advance for your input!

240 gibbs. my bad. small keyboard and weakening eyes.

 

[akdad]

Leave it to a tooth doc to start talking extractions totally just kidding

 

[akdad]

In seriousness feenix has some experience with the Gibbs and can probably help you. The 240 looks like it would be fun!

 

[waspocrew]

The Gibbs cartridges aren't difficult to load for - they just take a bit more time than a typical Ackley improved cartridge. Typically, you'll need to establish a false shoulder to headspace off as you are moving the shoulder forward quite a bit. Necking down 270 Win or 280 Rem brass would probably work best. 25-06 work work also, but you may want to expand the necks to at least .264 before necking down to ensure a more robust false shoulder.

I have a 6.5 Sherman (very similar to 6.5 Gibbs) and use 270 Win brass. False shoulder method works great.

For illustrative purposes, 270 Win necked down to .264 leaving false shoulder. Fireformed 6.5 Sherman round.

 

[tooth doc]

Leave it to a tooth doc to start talking extractions totally just kidding

did I say something about extractions? when I said feed. I meant. get ammo for without having to form. trim, Fireform etc.

 

[tooth doc]

The Gibbs cartridges aren't difficult to load for - they just take a bit more time than a typical Ackley improved cartridge. Typically, you'll need to establish a false shoulder to headspace off as you are moving the shoulder forward quite a bit. Necking down 270 Win or 280 Rem brass would probably work best. 25-06 work work also, but you may want to expand the necks to at least .264 before necking down to ensure a more robust false shoulder.

I have a 6.5 Sherman (very similar to 6.5 Gibbs) and use 270 Win brass. False shoulder method works great.

For illustrative purposes, 270 Win necked down to .264 leaving false shoulder. Fireformed 6.5 Sherman round.

am

l am familiar with the process, not hard, just time consuming and component wasteing. was hoping for an easy out. this may be my best choice however. short of rebarreling. thanks

 

[FEENIX]

l am familiar with the process, not hard, just time consuming and component wasteing. was hoping for an easy out. this may be my best choice however. short of rebarreling. thanks

Agreed! Qual Cart also carry them in a limited run, https://www.qual-cart.com/243 cal.htm

 

[tooth doc]

Agreed! Qual Cart also carry them in a limited run, https://www.qual-cart.com/243 cal.htm

just bought 100 rounds from Graf. thanks

 

[FEENIX]

just bought 100 rounds from Graf. thanks

Excellent! I did the same thing for my .30 Gibbs, but I started with .35 Whelen, -06, .270 Win, and .280 Rem brass before purchasing the Qual Cart brass. I do not have .24 cal at the moment and might do the Gibbs. Good luck and have fun with it.

 

[tooth doc]

Excellent! I did the same thing for my .30 Gibbs, but I started with .35 Whelen, -06, .270 Win, and .280 Rem brass before purchasing the Qual Cart brass. I do not have .24 cal at the moment and might do the Gibbs. Good luck and have fun with it.

thanks brother

 

[FEENIX]

thanks brother

You're welcome, Brother! Keep us all posted, and happy, safe hunting.

 

[Gary in MD]

Tooth,
I'm not sure where I saw it, but gun writer Wayne Van Zoll wrote an article some years ago with some load data for the 240 Gibbs. I'll see if I can find it if you're interested.

 

[sable tireur]

All loads tested in a 26-inch pressure barrel. *Fire-forming load

LOADS FOR THE .240 GIBBS *

Bullet/Weight Powder Primer Case Starting Maximum
Load Load
(gr.) (gr)

55-gr. Nosier Winchester CCI-250 LC-63 54.0 60.0
BT 760

60-gr. Sierra Hodgdon Fed. LC-63 44.0 50.0
HP Varget 215

70-gr. Hornady Vihtavuori Rem. R - P 50.0 55.0
Spire Point N-550 9.5M

75-gr. Sierra IMR CCI-250 R - P 50.0 57.0
HP 4007SSC

85-gr. Barnes Accurate Win. LC-63 47.0 53.0
XBT 2700 LRM

87-gr. Hornady Hodgdon CCI-250 Various 50.0 57.0
Spire Pt.* H4831SC

100-gr. Nosler Alliant Fed. LC-63 53.0 57.0
Partition RI-19 215

105-gr. RamShot Win. LC-63 43.0 51.0
Barnes Hunter LRM

105-gr. Speer Vihtavuori Rem. LC-63 44.0 51.0
Spitzer SP N-550 9.5M

Bullet/Weight Velocity
(fps)

55-gr. Nosier 4.310
BT

60-gr. Sierra 3,900
HP

70-gr. Hornady 3,875
Spire Point

75-gr. Sierra 3,725
HP

85-gr. Barnes 3,500
XBT

87-gr. Hornady 3,400
Spire Pt.*

100-gr. Nosler 3,400
Partition

105-gr. 3,140
Barnes

105-gr. Speer 3,350
Spitzer SP

https://www.thefreelibrary.com/The+...legendary+6mm+wildcat+is+still...-a0220097564

Article by Wayne van Zwoll:

https://gunsmagazine.com/guns/rifles/hunting-with-gibbs/

Enjoy!