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New old .25 cal wildcat
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<blockquote data-quote="Mike Matteson" data-source="post: 2838859" data-attributes="member: 101791"><p>What get me started on 280AI case necked down to either 6mm, or .257/280AI being built now. The 280AI case is about .1 longer to the shoulder than any other AI case. More powder, but not sure where this is going to lead too, but I am looking forward to see what I can come up with. I had gotten use 700 LA to use. Found in pond shops. A,B,C in the serial number are find to convert. Beyond that serial letter not so good. The other is I can get 280AI cases ready made, but have to size the necks.</p><p>I never had a 6mm, and wasn't impress with the 243 or 6mm. I wanted something with higher velocity. I am sorry to say I believer in veloctiy. With movement toward all copper bullets and the Hammer design bullets was a major step forward. I had used some barnes a great many years ago. Found to be hard to drive and didn't group very good. Groupinf was about 1" @ 100yds. To wide for me. If I can get a bullet to group closer to or under 1/2" @ 100yds, I am not interested in them. I did back then and now work with powder, primers, and all the other parts to but together a hunting load. The other was I want to extend my range out to 700yds+ or so. 500yds has been my max before. </p><p>Necking the case down to 6mm or 257 isn't a real problem. Just have to step the bushing down in steps. 4 steps for 6mm. </p><p>I do things a little different. I cut my brand new cases to all the same length first. The Peterson cases I have found varied several thousands from one case to the next. Then cut the necks for thickness. Then start my stepping my case necks down. I going to anneal after the 2nd down sizing. </p><p>Fire-forming cases have to be done anyway. So there no way around it. I am setting up a dumby action to do my fire-forming. I got or getting one barrel, and still looking for a .257 barrel that will match up to a Rem700 action. The barrel can be wore out. I am going to rechamber the barrel for my dummy action. That after I brake in the new barrel in either of the rifles.</p></blockquote><p></p>
[QUOTE="Mike Matteson, post: 2838859, member: 101791"] What get me started on 280AI case necked down to either 6mm, or .257/280AI being built now. The 280AI case is about .1 longer to the shoulder than any other AI case. More powder, but not sure where this is going to lead too, but I am looking forward to see what I can come up with. I had gotten use 700 LA to use. Found in pond shops. A,B,C in the serial number are find to convert. Beyond that serial letter not so good. The other is I can get 280AI cases ready made, but have to size the necks. I never had a 6mm, and wasn't impress with the 243 or 6mm. I wanted something with higher velocity. I am sorry to say I believer in veloctiy. With movement toward all copper bullets and the Hammer design bullets was a major step forward. I had used some barnes a great many years ago. Found to be hard to drive and didn't group very good. Groupinf was about 1" @ 100yds. To wide for me. If I can get a bullet to group closer to or under 1/2" @ 100yds, I am not interested in them. I did back then and now work with powder, primers, and all the other parts to but together a hunting load. The other was I want to extend my range out to 700yds+ or so. 500yds has been my max before. Necking the case down to 6mm or 257 isn't a real problem. Just have to step the bushing down in steps. 4 steps for 6mm. I do things a little different. I cut my brand new cases to all the same length first. The Peterson cases I have found varied several thousands from one case to the next. Then cut the necks for thickness. Then start my stepping my case necks down. I going to anneal after the 2nd down sizing. Fire-forming cases have to be done anyway. So there no way around it. I am setting up a dumby action to do my fire-forming. I got or getting one barrel, and still looking for a .257 barrel that will match up to a Rem700 action. The barrel can be wore out. I am going to rechamber the barrel for my dummy action. That after I brake in the new barrel in either of the rifles. [/QUOTE]
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