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Shooting & Reloading - Mausers, Big Bores and others >> Rifles

mauserand9mm
.400 member


Reged: 03/09/09
Posts: 1040
Loc: Queensland, Australia
Re: What is the slickest feeding bolt action rifle cartridge?
      19/09/13 09:11 PM

The advice you got wasn't correct. At 40,000psi (or more) taper isn't going to make a difference at the time of firing. Pressure acts in all directions and there's more area (ie force) pushing the case against the chamber so it can't drive any harder against the bolt than what the pressure is doing anyway. What causes case stretching is excessive headspace.

How it works (it was explained to me on the ParrallaxBill forum, with animated images) is that if there is too much headspace, the firing pin will push the case forward in the chamber. When the powder ignites, the pressure forces the case against the chamber wall. The case head is solid and can't grip the chamber wall so it is pushed back against the bolt face - the case stretches where the solid head joins the case body. This is the part of the case where head separations can eventually occur.

What 500Nitro said is correct - if you neck size only, the rest of the case becomes the defacto headspacing surface. Normally rimmed and belted cases will headspace on the rim or belt, but you can make it headspace on the case shoulder on a bottleneck case, or even the case body in an otherwise straight walled (tapered) case. And you do this by neck sizing only.

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Subject Posted by Posted on
* What is the slickest feeding bolt action rifle cartridge? CZ_hunter 16/09/13 04:46 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? bobrhess   16/09/13 05:43 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? tinker   16/09/13 06:51 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   16/09/13 07:00 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Don   16/09/13 07:47 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   16/09/13 07:59 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? mauserand9mm   16/09/13 08:53 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   16/09/13 09:20 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Huvius   16/09/13 10:19 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Mike_Bailey   16/09/13 05:53 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Ash   16/09/13 07:02 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? mauserand9mm   17/09/13 08:44 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   17/09/13 08:48 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? mauserand9mm   17/09/13 08:57 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 2152hq   18/09/13 12:21 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? mauserand9mm   18/09/13 01:26 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Jorge_in_Oz   17/10/13 12:55 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 93x64mm   18/09/13 04:10 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   18/09/13 04:52 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Rule303   18/09/13 09:56 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   18/09/13 10:28 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Rule303   19/09/13 08:12 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? tophet1   17/10/13 02:24 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? cordite   20/10/13 02:45 AM
. * * Re: What is the slickest feeding bolt action rifle cartridge? 500Nitro   19/09/13 11:59 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? DarylS   19/09/13 11:41 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? mauserand9mm   19/09/13 09:11 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? Rell   16/09/13 09:25 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? NitroXAdministrator   16/09/13 09:32 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? xausa   16/09/13 11:13 PM
. * * Re: What is the slickest feeding bolt action rifle cartridge? DarylS   17/09/13 12:07 AM

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