Mixing 9mm brass

[Metal God]

Hello , what is your opinion on mixing 9mm brass ? I'll be working up a rather hot load and thought I'd ask you guys what you think .

I had bought 1500 147gr Rainier plated HP and worked up some pretty accurate loads. I then got to thinking how reliable there expantion is so I emailed rainier and asked at what velocity there 9mm reliabily expand . They told me 1200fps do to the relitively small HP cavity . Well that was not what I was hoping to hear because I'm only in the 950fps area with these 147gr. Bullets .

So I went ahead and bought 1k of there 115gr PLHP to try out . I figure I should be able to get those to 1200fps with HS-6 or CFE-pistol . The thing is I don't really want to waist my good headstamped brass on this load and have a good amount of mixed 9mm brass I could use . My concern is since I'll be pushing them close to max pressures maybe mixing the head stamp is not a good idea .

What say you ?

[Calguns77]

I only reload mixed headstamped 9mm, not an issue.

[DarkKing]

Using different Brass has not been an issue... Now Nato Marked crimped primer pockets on the other hand.......

Only issue with mixed is to sort out crimped and non crimped brass. once you sort that you can swagg etc.

[Red9]

I also sort out those pesky belted cases too.

Sent from my SM-G900T using Tapatalk

[00Medic]

I use mixed stamped on all my 9mm and load close to max with CFE-pistol using hp's. Never a problem.

[Metal God]

So you guys don't think pushing a charge to max in such a small case will not be effected by case volume variations ? I've read with a high pressure round in such a small case . When loading at max pressures cases with less volume can play a roll in pressure spikes .

Is it you all don't feel that has any truth or you just have not had an issue mixing 9mm brass to date ?

[00Medic]

I should add to my previous statement. I do go through and remove any stepped case brass. No problems with any others (exluding military crimped. Actually never used any.).

[Desertdoc]

I'll keep it real simple. Any JHP moving greater than to 900FPS in any caliber will fvck up a chest cavity.

It is that simple.

It is simple kinematics of trauma.

[Desertdoc]

I should add to my previous statement. I do go through and remove any stepped case brass. No problems with any others (exluding military crimped. Actually never used any.).

MICP?

P080xx

[bigdawg86]

I'll keep it real simple. Any JHP moving greater than to 900FPS in any caliber will fvck up a chest cavity.

It is that simple.

It is simple kinematics of trauma.

I like this answer. Alot.

[Metal God]

I then got to thinking how reliable there expansion is so I emailed rainier and asked at what velocity there 9mm reliably expand . They told me 1200fps do to the relatively small HP cavity .

I'll keep it real simple. Any JHP moving greater than to 900FPS in any caliber will fvck up a chest cavity.

Really , even when the manufacture tells you the HP WILL NOT reliably expand at that velocity . Meaning it will be no different then ball ammo . You still believe it's a "F" you up bullet ???

[TomReloaded]

Max pressure is still less than +p, which is less than +p+, and still less than 9 major.

I'm not sure why you're worried about expansion with a plated target bullet though.

[Metal God]

hmm , I was thinking max pressure would and or can be in the +p range but was not thinking of +P+ .

When talking max pressure I was not really only speaking to max SAAMI specs but closer to max acceptable pressures for the cartridge on the whole . I understand that anything at sammi max is not likely going to hit proof loads pressure just by changing cases , even in those stepped cases . Although I did see a guys powder alarm get triggered when a stepped case got through and was charged .

As far as why try to have it expand . Why would you not ? Why buy the hollow point if you never intend to have it expand . The only reason I bought these was that I saw a jell test using there 45 caliber PLHP and it performed pretty good . So I thought I"d try these and see how they work . I can see that at 1200fps they may very well just bust apart on impact seeing how the 45 at 950fps did well but the jacket/plating did separate .

[Calguns77]

Really , even when the manufacture tells you the HP WILL NOT reliably expand at that velocity . Meaning it will be no different then ball ammo . You still believe it's a "F" you up bullet ???

If you're loading these for self defense i would reconsider, from a performance and legal standpoint it's not a great idea imho.

[TomReloaded]

If your bullet can't be reliably used at safe pressures, it's a terrible defensive bullet! Just load them up to mid ranges and use them for range ammo, that's really what they're intended for.