First 9mm loads and Powder overcharging question

[BLACKFIN]

The load

9mm luger
Bullet Berry 115 grain plated round nose.
5.5 grains of Hodgdon CFE-Pistol
COL= 1.150

i loaded 5 rounds using the above data To test them out, using the grain or “g” unit in my digital scale however i like to double check everything and something didn’t feel right, While calibrating some how i checked the weight of a bullet using the “gn” measure unit and give me very consistent 115 grains for the bullets but then it hits me. I checked the powder weight and it read 8.ish..... I checked again and the same almost 8.5... so i dump it and recharge it using the “gn” unit of measure with 5.5 “gn” of cfe-pistol, thinking that if i was wrong it was going to Underpowered if anything.

well, all 5 rounds shot without any problems and very accurate hitting a 6” plate at about 20-22 yards.


My question is which one is it G or GN ?

 

[LiveLife]

using the grain or “g” unit in my digital scale

"g" unit for digital scales is gram

"gn" unit for digital scales is grain

BTW, 5 grams is 77 grains.

 

[fxvr5]

The official abbreviation for grain is "gr", not "gn". Check your scale's owner's manual.

https://en.wikipedia.org/wiki/Grain_(unit)

 

[LiveLife]

The official abbreviation for grain is "gr", not "gn".

I believe "gr" is for "troy grain" ... But what do I know, I am just a cranky old internet poster.

Check your scale's owner's manual

My manuals show the following:

Hornady G2-1500: "gn" - grain
AWS Gemini-20: "gn" - grain
Smart Weigh Gem50: "gn" - grain
WAOAW TL50: "gn" - grain

And here's A&D FZ-i/FX-i series owner's manual (Page 15/84) - https://www.aandd.jp/products/manual/balances/fz_fx-i.pdf

"Unit: Grain = Abbreviation: GN"​

 

[fxvr5]

I believe "gr" is for "troy grain" ... But what do I know, I am just a cranky old internet poster.

My manuals show the following:

Hornady G2-1500: "gn" - grain
AWS Gemini-20: "gn" - grain
Smart Weigh Gem50: "gn" - grain
WAOAW TL50: "gn" - grain

And here's A&D FZ-i/FX-i series owner's manual (Page 15/84) - https://www.aandd.jp/products/manual/balances/fz_fx-i.pdf

"Unit: Grain = Abbreviation: GN"​

According to the wikipedia page, grain (gr) refers to troy weight, avoirdupois weight, apothecaries' weight.

Also, check your factory ammo boxes, and bullet boxes. They abbreviate it as gr on the ammo I have in front of me.

And gr is used in the SAAMI manual as well. https://saami.org/wp-content/upload...FP-and-R-Approved-2015-12-14-Posting-Copy.pdf

Folks can use gn if they want, but gr seems to be the 'proper' abbreviation for grain from what I can find.

 

[BLACKFIN]

So... the GN as shown in my scale setting/unit of measure is the correct?! or the G?

the scale have a “50g” calibration weight and that’s the unit i used to weight 5.5g of powder but the GN unit give me an accurate reading on the 115 grain bullet and read about 8.4g of powder

ETA: maybe that’s why the Lee bean scale was reading way off...?

 

[LiveLife]

So... the GN as shown in my scale setting/unit of measure is the correct?! or the G?

Yes, "GN" is the unit we use for grain for digital scales.

 

[fxvr5]

So... the GN as shown in my scale setting/unit of measure is the correct?! or the G?

What does your manual say?

Grains (gr) is for bullets and gunpowder weights as shown in handloading manuals in the USA. Where are you getting your data? From a source in the USA or from another country/foreign manual?

G is for grams, not grains. https://en.wikipedia.org/wiki/Gram

Weight one of your bullets. Which condition on your scale matches the bullet weight? Use that one.

 

[Jim Watson]

There was an Internet legend of a kid who got his Dad's scale set to the wrong units. Dad loaded ammo with it and blew up his gun.
Problem is, I can't find a unit enough larger than a grain to cause trouble but not too large to fit a typical cartridge. A gram is 15 grains, a pennyweight 24 grains, sure to be noticed.

 

[BLACKFIN]

Well, no shame here, i have to pull about 50 rounds of 45acp and recheck the powder, im sure i use the correct measure but better safe than sorry.

 

[Mr. Zorg]

Well, no shame here, i have to pull about 50 rounds of 45acp and recheck the powder, im sure i use the correct measure but better safe than sorry.

Can you not tell, roughly, by weighing the completed cartridge and comparing that to the (typical) sum of the weights of the components - bullet, brass, primer, and powder - without pulling them all down?

 

[reddog81]

No need to pull all 50 rounds. If one round was correct they all should be. If you flipped between grain and gram the case would be overflowing with powder.

 

[Walkalong]

A lot of posts disappeared, so y'all stay on topic, and before you hit the reply button, ask yourself if it is helpful to the op.

 

[Walkalong]

Asked and answered.