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Long Range Hunting & Shooting
25-06 vs. 257 Wby
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<blockquote data-quote="4xforfun" data-source="post: 241048" data-attributes="member: 9172"><p>I am not familiar with the gibbs. If it is an "improved" it should headspace properly when formig brass. With what you are discribing, it sounds like a true "wildcat" and will need to have specal attention to take care of the headspace issue.</p><p> </p><p>You can...</p><p> </p><p>(1) Put a small amount of "very fast" powder and top it off with cream-O-wheat and cotton, point the gun up, and fire form. I have never tried it, and my advice is talk to a gibbs shooter who has used this method before you try it. Use 25-06 brass</p><p> </p><p>(2) Just seat the bullet long with lots of neck tension and just shoot. This sounds like what you have tried, and it didn't work. Use more neck tension and be sure to "jam" the bullets. Some of the guys out there don't believe in this method. Use 25-06 brass</p><p> </p><p>(3) Buy an expander die and expand the neck up to .264, and then size them back down to .257 just far enough so that the case will just fit. Buy a true expander die with the propper expander button. I have wrecked more brass just using a regular expander button that is one size bigger. (ie..using a 264 die to expand your 25 cal.) Use GOOD LUBE. I like to feel a good amount of resistance on the bolt when closing it on the brass. Now you have created a "false" sholder in which to headspace off of. I would still jam the bullet for extra resistance. I would use max loads for the 25-06 to do the fire forming. You should get nice sharp sholders. Some of the guys out there actualy compete while FF brass. AND THEY WIN!!ge(</p><p> </p><p>You might be able to use 270 brass and skip the expander step. You just size enough of the brass so that it fits snugly into the gun. You just need to form a faulse sholder in which to headspace off of. If you have a bushing die (and you should) you could buy a bushing around .260 and take it down it two steps.</p><p> </p><p>Good luck</p><p>Tod</p></blockquote><p></p>
[QUOTE="4xforfun, post: 241048, member: 9172"] I am not familiar with the gibbs. If it is an "improved" it should headspace properly when formig brass. With what you are discribing, it sounds like a true "wildcat" and will need to have specal attention to take care of the headspace issue. You can... (1) Put a small amount of "very fast" powder and top it off with cream-O-wheat and cotton, point the gun up, and fire form. I have never tried it, and my advice is talk to a gibbs shooter who has used this method before you try it. Use 25-06 brass (2) Just seat the bullet long with lots of neck tension and just shoot. This sounds like what you have tried, and it didn't work. Use more neck tension and be sure to "jam" the bullets. Some of the guys out there don't believe in this method. Use 25-06 brass (3) Buy an expander die and expand the neck up to .264, and then size them back down to .257 just far enough so that the case will just fit. Buy a true expander die with the propper expander button. I have wrecked more brass just using a regular expander button that is one size bigger. (ie..using a 264 die to expand your 25 cal.) Use GOOD LUBE. I like to feel a good amount of resistance on the bolt when closing it on the brass. Now you have created a "false" sholder in which to headspace off of. I would still jam the bullet for extra resistance. I would use max loads for the 25-06 to do the fire forming. You should get nice sharp sholders. Some of the guys out there actualy compete while FF brass. AND THEY WIN!!ge( You might be able to use 270 brass and skip the expander step. You just size enough of the brass so that it fits snugly into the gun. You just need to form a faulse sholder in which to headspace off of. If you have a bushing die (and you should) you could buy a bushing around .260 and take it down it two steps. Good luck Tod [/QUOTE]
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