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

DarylS
.700 member

Reged: 10/08/05
Posts: 26977
Loc: Beautiful British Columbia, Ca...

Re: 416 ruger popping primers
25/02/11 05:14 AM

By the sounds of it now, due to temps being moderate, not high, a few leaking primers (soot around the primer idicates this) - some blown primers - .212" primer pocket obviously at least .001" per side oversize. All the ammo of that LOT # is suspect. Leaking and blown primers indicated TOO high pressure for THOSE cases. Thus, due to the conditions, one can only say that perhaps the brass is at fault - as previously thought - or the powder charge or powder itself is at fault. This does not happen often - but it can and does happen.

.001" over non-fired, is normal absolute max on the first firing only, thereafter no further expansion is allowed - I personally prefer to see NO expansion at the head or rim. This is the head and rim of the case - NOT the web.

Case head expansion is usually something measured before and after - at the same spot (pre-marked) on the case.

Known safe normal maximum web expansion should not be exceeded.

Normally, with a ctg. that factory ammo is available for, I fire factory ammo that gives descent velocity compared to specs and record the expansion at the web- all around the web and on all cases - ie: before and after firing. I record that measurement average, maximum and minimim. Whether it's even all the way around the brass, or only in one spot. With handloads, I do not exceed that number.

I would not be concerned about the colour at the case mouth.

Dealing with wildcats is another kettle of fish, entirely.

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

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

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Subject	Posted by	Posted on
416 ruger popping primers	bigjedd	24/01/11 08:35 PM
Re: 416 ruger popping primers	Rule303	02/02/11 09:15 PM
Re: 416 ruger popping primers	bigjedd	03/02/11 08:27 PM
Re: 416 ruger popping primers	Con	04/02/11 06:06 AM
Re: 416 ruger popping primers	bigjedd	04/02/11 07:26 AM
Re: 416 ruger popping primers	FATBOY404	04/02/11 03:14 PM
Re: 416 ruger popping primers	bigjedd	21/02/11 06:45 PM
Re: 416 ruger popping primers	FATBOY404	21/02/11 07:09 PM
Re: 416 ruger popping primers	bigjedd	21/02/11 07:47 PM
Re: 416 ruger popping primers	4seventy	23/02/11 10:37 AM
Re: 416 ruger popping primers	Con	22/02/11 04:15 AM
Re: 416 ruger popping primers	DarylS	22/02/11 11:33 AM
Re: 416 ruger popping primers	bigjedd	04/02/11 05:02 PM
Re: 416 ruger popping primers	FATBOY404	04/02/11 07:20 PM
Re: 416 ruger popping primers	DarylS	05/02/11 02:52 AM
Re: 416 ruger popping primers	Paul	23/02/11 12:52 PM
Re: 416 ruger popping primers	DarylS	24/02/11 05:21 AM
Re: 416 ruger popping primers	Con	24/02/11 09:29 AM
Re: 416 ruger popping primers	bigjedd	24/02/11 01:03 PM
Re: 416 ruger popping primers	bigjedd	24/02/11 01:19 PM
Re: 416 ruger popping primers	bigjedd	24/02/11 01:20 PM
Re: 416 ruger popping primers	4seventy	24/02/11 01:28 PM
Re: 416 ruger popping primers	bigjedd	24/02/11 01:33 PM
Re: 416 ruger popping primers	DarylS	25/02/11 05:14 AM
Re: 416 ruger popping primers	86thecat	19/03/11 05:15 AM
Re: 416 ruger popping primers	DarylS	19/03/11 08:41 AM
Re: 416 ruger popping primers	bigjedd	19/03/11 09:20 AM
Re: 416 ruger popping primers	bigjedd	06/07/11 08:40 AM
Re: 416 ruger popping primers	4seventy	24/02/11 02:23 PM
Re: 416 ruger popping primers	4seventy	24/02/11 09:03 AM
Re: 416 ruger popping primers	500Nitro	24/02/11 05:37 AM
Re: 416 ruger popping primers	bigjedd	24/02/11 07:15 AM
Re: 416 ruger popping primers	bigjedd	24/02/11 07:50 AM
Re: 416 ruger popping primers	4seventy	24/02/11 08:07 AM
Re: 416 ruger popping primers	MarinePMI	24/02/11 07:59 AM
Re: 416 ruger popping primers	bigjedd	05/02/11 08:52 AM
Re: 416 ruger popping primers	Altamaha	06/02/11 01:45 PM
Re: 416 ruger popping primers	tophet1	25/01/11 06:20 AM
Re: 416 ruger popping primers	500Nitro	25/01/11 06:28 AM
Re: 416 ruger popping primers	450_Ackley	25/01/11 06:42 AM
Re: 416 ruger popping primers	tophet1	25/01/11 07:14 AM
Re: 416 ruger popping primers	DoubleD	26/01/11 01:57 AM
Re: 416 ruger popping primers	450_Ackley	26/01/11 06:36 AM
Re: 416 ruger popping primers	FATBOY404	26/01/11 07:26 AM
Re: 416 ruger popping primers	bigjedd	26/01/11 07:44 AM
Re: 416 ruger popping primers	bigjedd	27/01/11 11:42 PM
Re: 416 ruger popping primers	450_Ackley	28/01/11 06:03 AM
Re: 416 ruger popping primers	Ben	28/01/11 07:04 AM
Re: 416 ruger popping primers	bigjedd	25/01/11 07:08 AM
Re: 416 ruger popping primers	450_Ackley	25/01/11 06:10 AM
Re: 416 ruger popping primers	Con	29/01/11 03:44 AM
Re: 416 ruger popping primers	bigjedd	29/01/11 10:28 AM
Re: 416 ruger popping primers	Con	29/01/11 09:18 PM
Re: 416 ruger popping primers	450_Ackley	30/01/11 06:53 AM
Re: 416 ruger popping primers	Con	30/01/11 08:30 AM
Re: 416 ruger popping primers	450_Ackley	30/01/11 09:42 AM

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