Thread: 1000m rifle.... What?

First the minimum body taper. Less taper= less case stretch. Also a better gas seal and it grips the chamber walls tighter which meant less thrust transmitted on the locking mechanism. Also a straight walled case ejects easier than a tapered case

The steep shoulder slows down brass flow so that= longer brass life. Also confined burning gasses in the case longer and that helped powder consumption

Longer necks, projectile doesn't take up powder space, also doesn't look like hell

That's pretty much how I read it, I would copy and paste it but I can't. I can screen shot it though if you want or send you the pdf file @Gibo

I found the tapered case bit interesting, I would have thought the tapered case would extract easier

Originally Posted by Toby

First the minimum body taper. Less taper= less case stretch. Also a better gas seal and it grips the chamber walls tighter which meant less thrust transmitted on the locking mechanism. Also a straight walled case ejects easier than a tapered case

The steep shoulder slows down brass flow so that= longer brass life. Also confined burning gasses in the case longer and that helped powder consumption

Longer necks, projectile doesn't take up powder space, also doesn't look like hell

That's pretty much how I read it, I would copy and paste it but I can't. I can screen shot it though if you want or send you the pdf file @Gibo

I found the tapered case bit interesting, I would have thought the tapered case would extract easier

So longer brass life and easier extraction......must be more to it?

Originally Posted by Gibo

So longer brass life and easier extraction......must be more to it?

More speed for same pressure.

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Originally Posted by Gibo

So longer brass life and easier extraction......must be more to it?

Fire forming brass has been the only reason I haven't bothered having a crack at one over the years.

Originally Posted by jakewire

Fire forming brass has been the only reason I haven't bothered having a crack at one over the years.

that's its only downfall.It cant be to long before you can buy 260AI cases if you can already get 280Ai.

Originally Posted by Toby

First the minimum body taper. Less taper= less case stretch. Also a better gas seal and it grips the chamber walls tighter which meant less thrust transmitted on the locking mechanism. Also a straight walled case ejects easier than a tapered case

The steep shoulder slows down brass flow so that= longer brass life. Also confined burning gasses in the case longer and that helped powder consumption

Longer necks, projectile doesn't take up powder space, also doesn't look like hell

That's pretty much how I read it, I would copy and paste it but I can't. I can screen shot it though if you want or send you the pdf file @Gibo

I found the tapered case bit interesting, I would have thought the tapered case would extract easier

The tapered case part makes no sense....

Originally Posted by PerazziSC3

The tapered case part makes no sense....

I thought I'd write it out wrong, should have screen shot it like this instead

Originally Posted by PerazziSC3

The tapered case part makes no sense....

Neither dose the longer neck bit, maybe only a tad longer in a sweede case but not in a 260 case.But who cares AI cases look badassss!!!