Reforming 348Win to 12.7x44R

[Bad Ass Wallace]

From L to R, Original round (Bertram), 348 Winchester, expanded to 12.7mm and trimmed to length, bullet seated and ready for fireforming, fully formed ready to reload. You may notice the rim on the 348 brass is a little smaller that the proper case but they work for bringing a 145 year old rifle "back to life".

My rifle shoots well at 75yds with black powder.

[toot]

WOW!! there is hope for this great antique?? thanks for what seems to be a simple task at making this non existent cartridge.

[RustyReel]

Nicely done. I'm using 50/70 Govt and 50 Alaskan as donor brass. Are you using 50/70 dies or do you happen to have a set of 12.7x44R dies??

[BS2]

Nicely done. I'm using 50/70 Govt and 50 Alaskan as donor brass. Are you using 50/70 dies or do you happen to have a set of 12.7x44R dies??

Yup, use 50 Alaskan net time.

[Bad Ass Wallace]

Have 12.7x44R dies. I also own a 50/70 but there is no way it will enter the chamber without skimming the case head and sizing the body down.

[Dutchman]

Offered for future reference:

Measured dimensions of 12.7x44R cartridges
and .50-70 for comparison:::::::::

12,17x42R rim fire (original Swedish military)
case oal = 1.610"
cart oal = 2.048"
rim diameter = .633/634"
rim thickness = .064"
head diameter = .545"


German primed case
headstamp = RWS 12.7x44R
case oal = 1.816"
rim diameter = .625"
rim thickness = .070"
head diameter = .542"


Dutchie's formed & fired .348 Winchester
case oal = 1.730"
cart oal = 2.128" (350gr Doudna)
rim diameter = .601"
rim thickness = .066"
head diameter = .547" (fire formed)
(unfired .348 case head = .547")


.50-70 Gov't (original)
case oal = 1.780"
cart oal = 2.327"
rim diameter = .664"
rim thickness = .079"
head diameter = .565"