Unknown caliber?
- Thread starter tribb
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lancetkenyon
Well-Known Member
Maybe 25-06AI. That is the best bet. But the neck/shoulder junction is way forward.
Maybe a 25 Sherman? That is a .25-06AI Improved even more, like a 30 Gibbs is to a .30-06AI.
Maybe a 25 Sherman? That is a .25-06AI Improved even more, like a 30 Gibbs is to a .30-06AI.
tribb
Well-Known Member
Belongs to a friend he found several like that in a batch of used brassy it bought at a gun show the inside diameter of the neck is 257 to 258 depending on where you measure
Frank in the Laurels
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..25 Gibbs, boy been awhile since I heard that name, like resurrecting the dead...
Check this out. Still some available dies for the old 25 Gibbs. Those old boys like Gibbs and Ackley were probably never without a grin on their faces. Sherman too. I've got a couple Sherman's and have been impressed thus far. In fact I've been considering building a 25 Sherman LA with all the 280 Rem brass I'm sitting on.
Frank in the Laurels
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$185.00, boy my old 25/06 looks even better today..lol
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I've posted this in the past. I shoot a 338 Gibbs. One of the characteristics of the Gibbs line is having the shoulder moved forward. In the case of my 338 Gibbs, the shoulder is moved forward about .100". Bear to form in a Ruger No.1, needs a false shoulder. Since the No.1 does not have much caming action to crush the shoulder, the false shoulder length is critical. The best success I had was to expand 35 Whelen cases to 375, then back to 35 for a false shoulder, then down to 338, whew..... Necks would split 2 or 3 out of 5 cases doing it any other way.
My shooting mentor (WWII Vet) was a huge Gibbs fan, think he had 5 or 6 rifles chambered in Gibbs. His favorite was a Mod 70 270 Gibbs.
Gibbs also played around with front ignition systems, he never proved it to be an advantage. I have in my old reloading gear a cut away case showing the front ignition system. I will see if I can find it and post a picture.
Attached is a write up I found years ago about Gibbs, allot of info in it. Think I need to read it again. There is a section about the 25 Gibbs.
My shooting mentor (WWII Vet) was a huge Gibbs fan, think he had 5 or 6 rifles chambered in Gibbs. His favorite was a Mod 70 270 Gibbs.
Gibbs also played around with front ignition systems, he never proved it to be an advantage. I have in my old reloading gear a cut away case showing the front ignition system. I will see if I can find it and post a picture.
Attached is a write up I found years ago about Gibbs, allot of info in it. Think I need to read it again. There is a section about the 25 Gibbs.
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comen
Well-Known Member
25 Gibbs. 35* Shoulder and .250" neck length. Inside neck diameter is small enough for good neck tension. Looks just like my 240 Gibbs
Hardshot
Well-Known Member
Looks to me to be a 280 Ackley.Just did the same comparison in my loading room
lancetkenyon
Well-Known Member
If your .280AI has a .257ID neck diameter, you are running too much neck tension...
Hardshot
Well-Known Member
Thanks Lance I guess I didn't pick up on that when reading through posts . Just got excited as it looks just like my 280 Ackley . This is what I love about this site guys pick up on our honest mistakes. Thank you
tribb
Well-Known Member
Thank you all I'll tell my buddy that it's a 257 Gibbs
