Well After doing some research on the 270 Ackley it does not appear to be near what the Gibbs has to offer. My questions on the Gibbs are, do you just fire form the standard 270 brass to make the Gibbs brass or are they made out of another cal.? After what I've read on Gibbs I am assuming that you just fire form because of his extensive work with the 30'06 case. What exactly is so different between the Ackley and Gibbs methods of improving this particular caliber (270)? THANKS IN ADVANCE

The Gibbs has the shoulder moved forward. Unlike the AI you can not fire factory ammo. To form you will expand the neck to .308 and then run the brass into the Gibbs die to form a false shoulder. Using this to headspace on while you fireform.

Gibbs used the 06 case. His neck is .25" long. You could use 270 brass. But, depending on the reamer you probably will have to trim the brass back. Or use a throat reamer to extend the throat to allow you to use the longer neck. .25 is plenty long for a 270.

Two other options would be the 270 Hawk from zhat and the 270Howell from AHR. Either would chamber your rifle and have dies and brass available.

Hey olinehand

Might try this site

http://www.30gibbs.net/

They will have lots of info

quote:

Originally posted by olinehand:
Well After doing some research on the 270 Ackley it does not appear to be near what the Gibbs has to offer. My questions on the Gibbs are, do you just fire form the standard 270 brass to make the Gibbs brass or are they made out of another cal.? After what I've read on Gibbs I am assuming that you just fire form because of his extensive work with the 30'06 case. What exactly is so different between the Ackley and Gibbs methods of improving this particular caliber (270)? THANKS IN ADVANCE

The easiest way to get .270 Gibbs cases would be to neck down .280 REM., 7X64mm, or even .30/'06 brass, leaving a "false shoulder" hump on the neck at the spot required to give you a hard bolt closure on chambering, thus ensuring that you are not running the risk of excessive headspace when fire-forming.

A lot of .30 Gibbs users fireformed cases using '06 brass by seating the bullet long so it jammed into the rifling and kept the casehead back against the bolt face. This method may work, but is considered a bit risky!

I have heard that the .270 Gibbs was Rocky Gibbs' favorite cartridge.

I have two 270 Gibbs rifles and I absolutely love them. They basically match the performance of the 270 WSM. It is a great cartridge with considerable improvement over the 270.

The original Gibbs uses 30-06 length brass. I believe Pacific also makes a reamer with a longer neck to take a 270 length case. Do not fire regular 270 loads in a 270 Gibbs '06 length chamber or you will experience extremely high pressures.

I firerform cases by necking down '06 brass to give it a false shoulder to headspace on. I use bullseye and corn meal. Never lost a case if new brass is used. Brass lasts a long time and never seems to need trimming

If interested in specific fireform information or loads send me a PM.