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

DarylS
.700 member

Reged: 10/08/05
Posts: 27009
Loc: Beautiful British Columbia, Ca...

Re: CZ 602 - Big bore entry rifle
25/12/20 11:05 AM

Exactly - set up your FL die to only partially size the body and just barely all of the neck, but not quite.
If you don't push the shoulder back each time, your brass will last a LOT longer.
The cases should be annealed about every 4 to 5 shots or so.
I would suggest they should last upwards of 20 shots each, if cared for.
The reason for partial sizing only.
Belted magnum chambers are usually long in the body length as the case supposedly headspaces on the belt.
Due to this over length body, once a case is fired, it stretches forward at the web to 'fill' the chamber.
If you bump the shell holder against the die, you will likely push the shoulder back down again (short die body). Reloading and firing again, again stretches the case at the web - thus the case get thinner and thinner at the web and case life of 4 shots or less is common with many belted magnums. This is less of a problem with rimless cases, as chambers are held to tighter standards as the body is the headspace for that style of ctg. In Europe the headspace laws are very similar to the SAMMI suggestions of .006" maximum.
That means with a belted case, only the distance from the base to the front of the belt needs to be within this limit. The body does not matter. Many mfg'ers are sloppy with the body measurement on the reamers. They do not care about handloading- especially if they sell ammunition as well.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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Subject	Posted by	Posted on
CZ 602 - Big bore entry rifle	Woldan	23/12/20 06:59 AM
Re: CZ 602 - Big bore entry rifle	Wayne59	23/12/20 10:12 AM
Re: CZ 602 - Big bore entry rifle	Woldan	23/12/20 10:52 AM
Re: CZ 602 - Big bore entry rifle	DarylS	23/12/20 01:29 PM
Re: CZ 602 - Big bore entry rifle	NitroX	23/12/20 02:09 PM
Re: CZ 602 - Big bore entry rifle	Ripp	24/12/20 05:24 AM
Re: CZ 602 - Big bore entry rifle	Woldan	23/12/20 09:50 PM
Re: CZ 602 - Big bore entry rifle	DarylS	24/12/20 05:02 AM
Re: CZ 602 - Big bore entry rifle	Woldan	24/12/20 08:59 AM
Re: CZ 602 - Big bore entry rifle	93x64mm	25/12/20 08:49 AM
Re: CZ 602 - Big bore entry rifle	DarylS	25/12/20 11:05 AM
Re: CZ 602 - Big bore entry rifle	Woldan	26/12/20 06:46 AM
Re: CZ 602 - Big bore entry rifle	NitroX	11/03/21 01:46 AM
Re: CZ 602 - Big bore entry rifle	DarylS	11/03/21 05:13 AM
Re: CZ 602 - Big bore entry rifle	Rule303	11/03/21 08:27 AM
Re: CZ 602 - Big bore entry rifle	Woldan	21/03/21 10:15 AM
Re: CZ 602 - Big bore entry rifle	DarylS	21/03/21 11:30 AM
Re: CZ 602 - Big bore entry rifle	Woldan	21/03/21 01:07 PM
Re: CZ 602 - Big bore entry rifle	DarylS	22/03/21 09:40 AM
Re: CZ 602 - Big bore entry rifle	DarylS	26/12/20 08:20 AM
Re: CZ 602 - Big bore entry rifle	Rule303	27/12/20 09:57 AM
Re: CZ 602 - Big bore entry rifle	DarylS	27/12/20 11:49 AM
Re: CZ 602 - Big bore entry rifle	Rule303	27/12/20 05:51 PM
Re: CZ 602 - Big bore entry rifle	DarylS	28/12/20 07:01 AM
Re: CZ 602 - Big bore entry rifle	Rule303	28/12/20 07:35 PM
Re: CZ 602 - Big bore entry rifle	Woldan	03/01/21 04:09 AM
Re: CZ 602 - Big bore entry rifle	DarylS	03/01/21 06:52 AM
Re: CZ 602 - Big bore entry rifle	Nick_Adams	10/03/21 08:02 AM
Re: CZ 602 - Big bore entry rifle	Homer	27/12/20 08:34 AM
Re: CZ 602 - Big bore entry rifle	NitroX	23/12/20 11:01 PM
Re: CZ 602 - Big bore entry rifle	Woldan	23/12/20 11:26 PM
Re: CZ 602 - Big bore entry rifle	93x64mm	23/12/20 10:43 PM

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