9mm reloads

Major Tom · 05-15-2017, 09:16 AM

I loaded up some 9mm using 4.8 grains of Unique over 124 grain Hornady JHP. When checking the powder load in the brass I noticed there was not much space for seating the bullet and that the powder would probably be crushed. Is this OK? Brass was measured OK for lenthg.

Chickenthief · 05-15-2017, 09:33 AM

What is your OAL?

Quickload says 87% filling at max. (1.169") so you should be good.
Even if you seat to 1.13" there should be a little air.

mrerick · 05-15-2017, 10:30 AM

Some powder occupies more volume by weight than other milled shapes.

Titegroup is known for being compact. The downside is that it's easier to double or overcharge a case with a compact powder.

Would a "full" cartridge case become oxygen starved? Unlikely. There is a fair amount of oxygen bound up within the powder granules themselves (in addition to carbon, hydrogen) of nitrocellulose. There is also oxygen between the grains of powder, which never sit solidly against each other. The surface of powder is also porous.

https://en.wikipedia.org/wiki/Smokeless_powder

There is some interesting discussion about the way powder within a cartridge case burns. Taken to extremes, it becomes more important in artillery and canon design.

noylj · 05-18-2017, 11:20 PM

Unique is a flake powder. It has a low bulk density.
It is NOT going to be 'crushed' by the bullet pressing down on the charge column.
Compressed loads are NOT a problem any way, other than in some folk's minds.

05-15-2017, 09:16 AM	#1
Major Tom User Join Date: Jan 2017 Location: S.E. Iowa Posts: 484 Thanks: 533 Thanked 227 Times in 124 Posts	9mm reloads I loaded up some 9mm using 4.8 grains of Unique over 124 grain Hornady JHP. When checking the powder load in the brass I noticed there was not much space for seating the bullet and that the powder would probably be crushed. Is this OK? Brass was measured OK for lenthg. __________________ I Build Custom Pistol Boxes

05-15-2017, 09:33 AM	#2
Chickenthief User Join Date: Dec 2016 Location: Denmark Posts: 135 Thanks: 0 Thanked 131 Times in 48 Posts	What is your OAL? Quickload says 87% filling at max. (1.169") so you should be good. Even if you seat to 1.13" there should be a little air. Attached Thumbnails

05-15-2017, 10:30 AM	#3
mrerick Super Moderator - Patron LugerForum Life Patron Join Date: Dec 2009 Location: Eastern North Carolina, USA Posts: 3,909 Thanks: 1,374 Thanked 3,110 Times in 1,510 Posts	Some powder occupies more volume by weight than other milled shapes. Titegroup is known for being compact. The downside is that it's easier to double or overcharge a case with a compact powder. Would a "full" cartridge case become oxygen starved? Unlikely. There is a fair amount of oxygen bound up within the powder granules themselves (in addition to carbon, hydrogen) of nitrocellulose. There is also oxygen between the grains of powder, which never sit solidly against each other. The surface of powder is also porous. https://en.wikipedia.org/wiki/Smokeless_powder There is some interesting discussion about the way powder within a cartridge case burns. Taken to extremes, it becomes more important in artillery and canon design. __________________ Igitur si vis pacem, para bellum - - Therefore if you want peace, prepare for war.

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05-18-2017, 11:20 PM	#4
noylj User Join Date: Mar 2013 Posts: 41 Thanks: 0 Thanked 13 Times in 12 Posts	Unique is a flake powder. It has a low bulk density. It is NOT going to be 'crushed' by the bullet pressing down on the charge column. Compressed loads are NOT a problem any way, other than in some folk's minds.