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30 '06 AI?
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<blockquote data-quote="Victor O&#039;Neill" data-source="post: 13421" data-attributes="member: 3225"><p><strong>Re: 30 \'06 AI?</strong></p><p></p><p>Dan,</p><p>I don't have a 30 Gibbs but just had a 270 Gibbs built. I got most of my information from a friend that had an old book on the Gibbs cartridges. The 30 Gibbs has a 35 degree shoulder and is longer than you said. Pac-nor has barrels already chambered for the 30 Gibbs. I had a reamer built for my 270 Gibbs with a longer neck so I could use 270 or 280 brass if I wanted too. I seated a Nosler 150 gr partition in a 270 case so it would barely fit in my magazine and sent it to Clymer to use as a pattern. All I plan on shooting is 150gr Nosler partitions. The fireforming was not too difficult once I got it figured out. You have to create a small shoulder to hold the case against the bolt. I tried new 30.06 brass by necking down to 270 Gibbs. I used 150 gr bullets (not partitions/too expensive) seated into the lands with a max 270 Win load. They didn't fully form and the necks were only about .21". I next tried new 270 brass necked up to 30.06 and then back down to 270 Gibbs. I necked the cases down to where they were a crush fit and seated the bullets to where they were well into the lands. The bolt is hard to close. On the first 10 shots 8 formed perfectly and 2 split the shoulder. I quit and went home. I emptied all the cases and annealed all the necks and shoulders. I went back and fireformed 40 cases with no more problems. The good thing about doing it this way is you can use the fireforming loads for hunting if you don't mind using a single shot (they're too long to fit in the magazine). This procedure should work with a 30 Gibbs also. Just size up larger than .308 and back down to 30 Gibbs to create a small shoulder. One problem I ran into on my Browning A-bolt is that I had to modify the feed ramp in my clip to allow for the shoulder being moved forward.</p><p></p><p>Good luck,</p><p>Victor</p></blockquote><p></p>
[QUOTE="Victor O'Neill, post: 13421, member: 3225"] [b]Re: 30 \'06 AI?[/b] Dan, I don't have a 30 Gibbs but just had a 270 Gibbs built. I got most of my information from a friend that had an old book on the Gibbs cartridges. The 30 Gibbs has a 35 degree shoulder and is longer than you said. Pac-nor has barrels already chambered for the 30 Gibbs. I had a reamer built for my 270 Gibbs with a longer neck so I could use 270 or 280 brass if I wanted too. I seated a Nosler 150 gr partition in a 270 case so it would barely fit in my magazine and sent it to Clymer to use as a pattern. All I plan on shooting is 150gr Nosler partitions. The fireforming was not too difficult once I got it figured out. You have to create a small shoulder to hold the case against the bolt. I tried new 30.06 brass by necking down to 270 Gibbs. I used 150 gr bullets (not partitions/too expensive) seated into the lands with a max 270 Win load. They didn't fully form and the necks were only about .21". I next tried new 270 brass necked up to 30.06 and then back down to 270 Gibbs. I necked the cases down to where they were a crush fit and seated the bullets to where they were well into the lands. The bolt is hard to close. On the first 10 shots 8 formed perfectly and 2 split the shoulder. I quit and went home. I emptied all the cases and annealed all the necks and shoulders. I went back and fireformed 40 cases with no more problems. The good thing about doing it this way is you can use the fireforming loads for hunting if you don't mind using a single shot (they're too long to fit in the magazine). This procedure should work with a 30 Gibbs also. Just size up larger than .308 and back down to 30 Gibbs to create a small shoulder. One problem I ran into on my Browning A-bolt is that I had to modify the feed ramp in my clip to allow for the shoulder being moved forward. Good luck, Victor [/QUOTE]
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