Complete Round Weight Variance

I'm probably overthinking this, but here goes:

I just switched my reloading operation from 9mm to 45ACP for bullseye.  Load is unfired Starline brass with Zero 185gr JHP over 4.2gr of N-310.  Press is a Dillon 650.  For some reason I never did this with loading 9mm, but since the 45ACP is for bullseye, I thought it would be interesting to weigh each round on the first 50 to see what kind of consistency I was getting.  What turned out is a 1.8gr delta between the heaviest and lightest load. I realize there's not much I can do about brass and bullet variances, but thought it worth a try.

Here's the breakdown of the 50 rounds, heaviest to lightest:  6 were in the 274.9gr - 275.2gr range, 37 were in the 274.2gr - 274.8gr range, and 7 were in the 273.4gr - 273.9gr range.

Are these variances acceptable, is it an un-safe variance, and/or am I obsessing over nothing?

THOSE ARE GREAT NUMBERS. YEARS AGO I WEIGHED FEDERAL MATCH THAT I HAD (AND STILL HAVE 2 CASES OF IT). SAME LOT NUMBER OF COURSE. THIS LOT SHOT GREAT OUT OF EVERY GUN I RANSOMED IT IN . I FOUND IT TO 2 - 6GRS DIFFERENCE( IF I REMEMBER CORRECTLY). IN CASES OF MATCH BULLETS I FOUND VARIATIONS OF UP TO 1+GR. THE BRASS WEIGHT VARIED A LOT MORE. BUT IT SEEMED THE BRASS WEIGHT OF COURSE DEPENDED ON OAL BRASS LENGTH.THIS WAS ON VIRGIN STARLINE, REMINGTON  AND WINCHESTER IN BOTH 9MM AND .45.    JP

I had a squib in a small batch of 45 rds I loaded playing with different sizing dies, unsized, 454, and ACP. Weighing them afterwards to find any evidence of more appeared to be a 'fools errand'.

Weighing finished rounds is only good if they all dropped on the floor and you need to separate by bullet weights!

200/185/160

WesG wrote:I had a squib in a small batch of 45 rds I loaded playing with different sizing dies, unsized, 454, and ACP. Weighing them afterwards to find any evidence of more appeared to be a 'fools errand'.

Ha!  I have to agree!

Thanks everyone for your responses.  Moving on to more rational topics!

james r chapman wrote:Weighing finished rounds is only good if they all dropped on the floor and you need to separate by bullet weights!

200/185/160

There is one more instance where it is important:

"Sh!t!  That mis-feed happened again and I double charged that round.  Wait a minute... maybe I double charged the first time!?!  Damn, the first one is among the other thirty in the tray..."

In the above instance, the mis-feed actually caused a nick in the case mouth on both cases, so a visual inspection followed by a weight check verified that I had indeed double charged the first one.