New bullet weight spread?

[Wing Rider]

I just opened my first box of bullets for reloading. I have a box of Hornady FP/XTP 158 gr for loading 357 mag. Item #35780. Since this is a first for me, I weighed each bullet to see what the actual weight was. Although I know there may be some small variances between my scale and Hornady's scale, the following is what I got. Is this spread of weights typical for a box of bullets?
4 - 157.6 gr
11-157.7 gr
17-157.8 gr
29-157.9 gr
12-158 gr
2 - 158.1 gr
4 - 158.2 gr
8 - 158.3 gr
5 - 158.4 gr
3 - 158.5 gr
2 - 158.6 gr
1 - 158.7 gr
1 - 159 gr
1 - 159.2 gr
The total spread between the bullets was 1.6 grains. I would expect this to be OK but since this is my first time at reloading, thought I would ask.
Thanks

 

[Walkalong]

Yep, it's just fine, but if you can sort them and shoot the difference in sorted vs unsorted, you are a pistol god.

Welcome to THR

 

[markr6754]

Per SAAMI, the tolerance for lead and lead core bullets greater than 100 gn is +- 1.5%, giving an accepted spread of 155.63 gn to 160.37 gn. Your distribution is well within that spread. I ran a distribution sample for 115gr 9mm from Everglades Ammo a few months ago. My distribution varied significantly from yours...but also remained well within spec.

As Walkalong suggested, I separated the bullets by weight and loaded and shot them in groups...and detected not a bit of difference. I stopped weighing after the first 300 or so.

 

[glc24]

That's like weighing a finished round of the exact same head stamp, charge weight, bullet type and exact seating depth.
No two will weigh the same! Well, maybe 99.999% of the time they won't.

 

[Wing Rider]

Thanks for the info. I thought it was OK just wanting to make sure.

 

[Dudedog]

Welcome to THR lots of great people here.
Some spread but not bad at all really, about 50% of them are + or - .1 gr of each other.
Heck the one that was 159.2 may be that heavy because you wiped .1 gr of something off your fingers on it.
Getting oil from your fingers on light check weights will cause them to weigh incorrect values, getting finger oil/sweat on the pan can also skew the numbers.
I have tested this a couple times just to prove its true, of course it would have been nicer if I was planning on testing it.....

 

[Wing Rider]

Thanks for the info. Trying to learn as much as I can.