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AR2201
.275 member


Reged: 31/08/05
Posts: 57
Loc: Oz
Re: Backthrust on actions
      20/10/05 08:28 PM

All

Many thanks, good stuff (especially the greasing of hinges not oiling them). My calculations put the 45/70, 30-06 and 9.3x74R pretty much on a par as far as backthrust.

But, anyway I shuffle it, the 375 H&H Flanged comes out as a marked step up from these.

I note this seems to be reflected in manufacturers offerings with the 9.3x74R often being the top of the small/medium bore actions and the 375 the bottom of the big bore range eg. Merkel.

So we can say that a 45/70 405gn at 1850fps and a 45/90 405gn at 2050fps both generate the same backthrust (all else being equal) as they both are notionally operating at the same pressure with the same case head size?

AR2201
Rumours as to my death are greatly exaggerated

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Entire topic
Subject Posted by Posted on
* Backthrust on actions AR2201 18/09/05 06:06 PM
. * * Re: Backthrust on actions NitroXAdministrator   28/10/20 04:53 AM
. * * Re: Backthrust on actions crshelton   28/10/20 02:13 PM
. * * Re: Backthrust on actions NitroXAdministrator   28/10/20 03:03 PM
. * * Re: Backthrust on actions Hunter4752001   28/10/20 05:47 PM
. * * Re: Backthrust on actions NitroXAdministrator   28/10/20 06:17 PM
. * * Re: Backthrust on actions DoubleD   28/10/20 11:29 PM
. * * Re: Backthrust on actions Otto   18/09/05 10:54 PM
. * * Re: Backthrust on actions sportingrifle   20/09/05 04:54 PM
. * * Re: Backthrust on actions AR2201   20/10/05 08:28 PM
. * * Re: Backthrust on actions 500Nitro   20/10/05 08:47 PM
. * * Re: Backthrust on actions AR2201   20/10/05 10:16 PM
. * * Re: Backthrust on actions unspellable   21/09/05 02:53 AM
. * * Re: Backthrust on actions 500Nitro   18/09/05 08:47 PM
. * * Re: Backthrust on actions AR2201   18/09/05 10:17 PM
. * * Re: Backthrust on actions 500Nitro   18/09/05 10:38 PM
. * * Re: Backthrust on actions AR2201   19/09/05 01:36 AM
. * * Re: Backthrust on actions 500Nitro   19/09/05 01:57 AM
. * * Re: Backthrust on actions banzaibird   18/09/05 10:55 PM
. * * Re: Backthrust on actions bonanza   18/09/05 11:41 PM
. * * Re: Backthrust on actions DUGABOY1   19/09/05 04:55 AM
. * * Re: Backthrust on actions banzaibird   19/09/05 06:02 AM
. * * Re: Backthrust on actions Marrakai   19/09/05 10:39 AM
. * * Re: Backthrust on actions 500grains   19/09/05 01:06 PM
. * * Re: Backthrust on actions AR2201   20/10/05 09:21 PM
. * * Re: Backthrust on actions banzaibird   18/09/05 11:53 PM
. * * Re: Backthrust on actions 500Nitro   18/09/05 11:53 PM

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