Powder Charge Variation on Match Ammo


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Martyk
February 25, 2009, 05:55 PM
I just had a VERY interesting conversation with an employee of a name brand reloading machine company.

I own one of these machines and called up to see if the accuracy of the Thrower Bar could be improved. I am getting between a .3 to .5 grain variation shot to shot. The employee said this was within the accuracy the unit was marketed at. OK... I did not have a problem with this. I used the machine for many years for pistol only and didn't worry too much about accuracy until I recently began loading rifle.

What was interesting was the next statement that this man made. He said that the small variation would not make a difference in my rifle (PTR91). He went on to say that even Federal Match grade ammo has a 3.0 to 5.0 GRAIN (not tenth of a grain) :eek: variation on power charge from cartridge to cartridge. He asserted that he personally pulled down a box of Federal Match ammo and this was in fact his finding. :what:

Can anyone affirmatively confirm or dispel this assertion???

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rcmodel
February 25, 2009, 05:57 PM
Total BS!

They very well might have 0.3 to 0.5 grain variation, although even that is very unlikely on Federal Match ammo.

There is No Way they have 3 - 5 grains differance.

rc

USSR
February 25, 2009, 06:58 PM
Total BS!

+1.

Don

Walkalong
February 25, 2009, 07:30 PM
total bs!
+2 ;)

a.c.

Zak Smith
February 25, 2009, 07:35 PM
In my 308 load with Varget, each 0.1gr is approx 10 fps. If there's variation of +/- 0.3gr, that's a minimum spread of 60 fps to start. That's terrible. I load to the closest 0.1gr.

lgbloader
February 25, 2009, 08:34 PM
Total BS!


I'd have to agree as well. Perhaps there was major misunderstanding or miscommunication. Something don't smell right.

LGB

Martyk
February 25, 2009, 09:06 PM
It's got to be a mis understanding. I repeated what the guy said to me and he confirmed it just the way I wrote it in the OP.

My reaction was the same as you guys... No F&^$% Way !

Well, maybe it was Crack Day at work... Let's stop wasting bandwidth on this one...

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