Alpha munitions brass

Get or give advice on equipment, reloading and other technical issues.

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bruce moulds
Posts: 2401
Joined: Sun Jun 19, 2005 4:07 pm

Re: Alpha munitions brass

#31 Postby bruce moulds » Mon Apr 16, 2018 7:10 am

malcolm,
the old dead guys in the scheutzen game used the same case for each shot, reloading it each time.
keep safe,
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880
http://youtu.be/YRaRCCZjdTM

Malcolm Hill
Posts: 251
Joined: Fri Aug 25, 2006 9:40 pm
Location: Mid North S.A.

Re: Alpha munitions brass

#32 Postby Malcolm Hill » Mon Apr 16, 2018 8:23 am

Now you're on the money Bruce. Consistency shot to shot, minimal outlay for one case, no grizzling about machinegunning, no need for time delay arguments on electronic targets and hugely improved barrel life. Ticks all the boxes, I like it. Regards Malcolm.

bruce moulds
Posts: 2401
Joined: Sun Jun 19, 2005 4:07 pm

Re: Alpha munitions brass

#33 Postby bruce moulds » Mon Apr 16, 2018 9:24 am

malcolm,
even more consistency if you clean every shot.
same barrel condition every time too.
keep safe,
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880

http://youtu.be/YRaRCCZjdTM

Bigtravoz
Posts: 109
Joined: Sat Apr 22, 2017 7:43 pm

Re: Alpha munitions brass

#34 Postby Bigtravoz » Sat Jun 02, 2018 8:20 am

bruce moulds wrote:malcolm,
the old dead guys in the scheutzen game used the same case for each shot, reloading it each time.
keep safe,
bruce.


Did they stop and trim the case every third shot? :wink:

bruce moulds
Posts: 2401
Joined: Sun Jun 19, 2005 4:07 pm

Re: Alpha munitions brass

#35 Postby bruce moulds » Sun Jun 03, 2018 9:32 am

no need if the chamber is dry.
keep safe,
bruce.
"SUCH IS LIFE" Edward Kelly 11 nov 1880

http://youtu.be/YRaRCCZjdTM

Norm
Posts: 837
Joined: Fri Jul 23, 2010 10:21 pm
Location: Gippsland, Victoria

Re: Alpha munitions brass

#36 Postby Norm » Tue Nov 20, 2018 12:18 pm

I have done some testing of prototype 6 Dasher brass that had small rifle primers with large rifle size flash holes.
Avoid small primer brass with large flash holes like the plague.
Your normal load with Lapua brass will blow a hole in primer where the firing pin hits. This means you will have to back your load right down to be safe.

Julian D
Posts: 171
Joined: Fri Dec 05, 2014 4:42 am
Location: Mackay

Re: Alpha munitions brass

#37 Postby Julian D » Tue Nov 20, 2018 12:26 pm

Interesting,
I have a box of 308 cases here. Waiting for a magical barrel to turn up before I do any testing.

The yanks are raving about the consistency of the cases.
Weighed 20, and 17 of them are less than 0.5gn difference, and aprox 4gn heavier than a Lapua Palma cases.

sungazer
Posts: 133
Joined: Fri Mar 17, 2017 7:58 pm

Re: Alpha munitions brass

#38 Postby sungazer » Tue Nov 20, 2018 12:32 pm

I had a few Lapua Palma 308 cases that had the flash holes damaged slightly during primer removal. The pin was not ground down enough. Anyway I drilled them to make them uniform only at 1.59mm not the 1.8mm of a large flash hole. The result was a 20fps increase in MV and a slightly higher ES.

bolster55
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Location: NE Vic
Contact:

Re: Alpha munitions brass

#39 Postby bolster55 » Tue Nov 20, 2018 4:09 pm

The smaller the fire hole equals less pressure on the primer

willow
Posts: 193
Joined: Sat Aug 15, 2015 9:51 pm

Re: Alpha munitions brass

#40 Postby willow » Tue Nov 20, 2018 6:25 pm

I have received 200 of the 6XC brass. It's heavier than Norma and I presume slightly less capacity but haven't measured. Haven't had a chance to test it properly yet but 38gr of RL16 was safe in my rifle. Headspacing slightly longer than Norma out of the box but no issue with chambering in a standard 6XC reamer.

Redhawk
Posts: 58
Joined: Thu Mar 16, 2017 9:24 pm

Re: Alpha munitions brass

#41 Postby Redhawk » Tue Nov 20, 2018 7:54 pm

Willow, where did you buy such treasure?

Longranger
Posts: 235
Joined: Sat Mar 02, 2013 9:49 pm
Location: Queensland

Re: Alpha munitions brass

#42 Postby Longranger » Wed Nov 21, 2018 12:00 pm

bolster55 wrote:The smaller the fire hole equals less pressure on the primer


How does that work? I take it that a smaller flash hole reduces brisance which in turn changes the shot start and pressure rise profile.

The pressure in the case and pressure acting on the primer in a given case would be same, regardless of flash hole size.

wsftr
Posts: 56
Joined: Tue Jan 30, 2018 12:58 pm

Re: Alpha munitions brass

#43 Postby wsftr » Wed Nov 21, 2018 5:49 pm

Gyro wrote:Peter. Please define your last sentence ? And has ANYONE ever properly tested case weight variation vs long range accuracy ? If we use Lapua cases we need not bother weighing ? I do and don't weigh them. I'm waiting for that guy Bryan to publish some test results.


You should contact Donovan on acurateshooter - he has a lot of interesting info in this area.
I've got multiple 10 shot groups holding .4moa vertical at 1k so I don't bother...Lapua case volume isn't a limiting factor to getting consistently under .5moa vert at 1k IME.
Last edited by wsftr on Wed Nov 21, 2018 5:59 pm, edited 1 time in total.

willow
Posts: 193
Joined: Sat Aug 15, 2015 9:51 pm

Re: Alpha munitions brass

#44 Postby willow » Wed Nov 21, 2018 5:50 pm

Redhawk wrote:Willow, where did you buy such treasure?


Precision Varminting - Beau is bringing it in. Didn't have a whole lot of 6XC brass in his first shipment (1000 pieces only for 6XC but 5000 6.5 Creedmore), it's also the most expensive brass at $250 per 100.

BATattack
Posts: 965
Joined: Mon Dec 29, 2008 10:29 pm

Re: Alpha munitions brass

#45 Postby BATattack » Wed Nov 21, 2018 6:52 pm

I got some 308 brass and it weighs and measures extreamly well! The best out of box brass ive seen. Even measuring case mouth diameter for consistency and ovality and im only getting .0005" BEFORE SEATING A BULLET!

The headspace is withing .002" which is half of lapua and the only thing i can see ill need to do is chamfer case necks.

How it lasts and the flash holes effect ES remains to be seen but so far it looks very promising.


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