Another reason not to shoot someones loads

[GameHauler]

About 4 years ago I had the old gent that lives across from my shop
load me up about 50 7MM Rem Mag rounds from the stuff I had bought
to load for my Desert Sheep hunt but never did since I did not have the
equipment and my neighbors press was not working at the time.
Any way I was always a little worried about them and once I started to buy
my own equipment I weighted the loaded rounds and found as much as a
grain variance in them.
I attributed part of it to different brass.
On my last order of supplies I ordered a 7MM collet for my puller and pulled
them today.
I found as much as a grain difference in the charges.
I knew he had only used a dipper to load them and goes to show how important
a good scale is.
Be careful out there.
Mike

[Hairtrigger]

I have weighed a bunch of empty brass and find easily more than a grain difference in a lot of 100 cases.
Go with your gut feeling but in my case one grain difference in a round like 7mag would not have caused me alarm.
Now... if you were at max load then add an extra grain of powder your primers may start to show more clues.

[charles p]

Some BR shooters measure powder volume, not weight - I think.

[jhalcott]

 I have weighed FACTORY ammunition with MORE than a grain difference in the rounds. I have a box of SAKO .223's that weigh almost TEN grains different from high to low. Charlie is correct about some BR shooters going with volume rather than weight!  I am NOT saying it is OKAY to use some one else's loads. SOME reloaders are VERY carefull with the processes and others are not. The gent who loaded game hauler's ammo seemed to do a great job! Obviously sorting cases, primers, bullets AND weighing powder to get THAT close of a spread. I'd need to know the powder charge and how he arrived at it for MY OWN self assurance that it is a safe load!

[corbanzo]

I throw most of my charges nowadays, so it gets done by volume, I'm sure there are some weight variances.  Even loads I had previously weight each, when I had thrown the same loads, I didn't have a decrease in accuracy.