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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

DarylS
.700 member

Reged: 10/08/05
Posts: 26514
Loc: Beautiful British Columbia, Ca...

Re: Here we go -- Huglu 12ga to 45/120 Nitro
01/04/09 02:36 AM

I always headspace on the brass I am going to use. I generally buy brass of the same lot in bunches of 500 for varmint ctgs. & BP Competition ctgs. and 200's for other rifle rounds.

When I buy a reamer for a ctg., I measure brand new brass of the same lot and have to reamer ground to .001" over brass measure - head diameter & shoulder diameter and length rim to shoulder/neck. I want as little expansion as possible - more accurate and brass lasts forever. I NEVER push a shoulder back while sizing. They've never become tight or refused to chamber and I am not a 'mild' loader. For example, my 22" 9.3x62 gets 2,519fps with 286gr. Normas and 2,675fps with 270's. Brass has over 15 firings now and is still going strong. The barrel's getting a bit long throated but still holding 1 1/4".

With belted mags, trouble looms due to loose manufacturing tolerances on headspace - best to measure all brass and divide into groups. Pick the group with the largest # of cases, usually 1/2 way, short to long (1/2 way is about .005" slop) and use that measure for the headspace - throwing out or turning back those that are too long, .001" to .005" OVER the middle of the road. this slop is why lots of buys have trouble with longevity with belted mag. cases. Any touching of the shoulders while sizing just magnifies the headspace slop. Belted cases are not needed today, except on straight cases.

Here's a suggestion for chambering a belted mag, like a .338, etc - have the reamer mfg'r grind off the belt section, then turn them off the brass cases. Result is a perfect .338 WinMag semi-rim that headspaces on the shoulder where it should. With a claw, the rim can also be turned down to head diameter and will work perfectly - true rimless .338 Mag, or 7mm mag, or whatever mag.

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

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

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Subject	Posted by	Posted on
Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	20/01/09 02:56 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Al_in_Mi	26/04/09 05:55 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	REN3	27/04/09 06:37 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	lancaster	20/01/09 07:15 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	20/01/09 11:08 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	22/01/09 12:04 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	CptCurl	22/01/09 04:36 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	22/01/09 01:18 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	23/01/09 01:52 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	DarylS	24/01/09 04:37 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	25/01/09 08:21 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	29/01/09 01:39 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	01/02/09 06:22 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Al_in_Mi	01/02/09 09:15 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	02/02/09 12:46 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	02/02/09 05:18 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	07/02/09 11:44 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	12/02/09 02:10 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	15/02/09 05:47 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	DarylS	15/02/09 06:15 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	15/02/09 10:37 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Sarg	15/02/09 12:53 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	17/02/09 12:36 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	21/02/09 01:36 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	11/03/09 01:47 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	11/03/09 10:25 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	12/03/09 02:25 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	12/03/09 11:07 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	13/03/09 01:18 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	18/03/09 01:03 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	23/03/09 02:29 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	24/03/09 02:39 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	25/03/09 10:25 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	26/03/09 06:33 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	DarylS	26/03/09 07:24 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	27/03/09 10:23 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	28/03/09 01:04 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	28/03/09 10:36 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	29/03/09 11:59 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	31/03/09 04:10 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	31/03/09 10:33 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	DarylS	01/04/09 02:36 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	06/04/09 01:00 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	REN3	08/04/09 09:50 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Bramble	08/04/09 10:04 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	peter	09/04/09 05:03 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	09/04/09 08:33 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	AZDAVE	08/04/09 12:12 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	Jeffeosso	08/04/09 10:01 PM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	REN3	09/04/09 12:01 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	DarylS	09/04/09 12:53 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	REN3	09/04/09 09:25 AM
Re: Here we go -- Huglu 12ga to 45/120 Nitro	tinker	09/04/09 02:15 PM

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