Buy +P brass for 147gr 9mm carbine subsonic loads

[748]

I would like to work up a load 9x19mm 147gr xtp with either HS-6 or AA7, kept subsonic in a carbine specifically for coyote assassination.
Do I need +P brass to get the projectile moving around 1,050 to 1,100 fps or no?
I was going to buy some 147gr +P to see if it was super sonic but at $30 for a box of 20 or 25 I was like nope.

 

[ReloaderFred]

There's no difference between +P and standard 9x19 brass, other than the headstamp.

Hope this helps.

Fred

 

[Texas10mm]

https://www.starlinebrass.com/9mmplusp-brass

Read that. Now you can answer your own question.

 

[kcofohio]

^^What Fred said.^^
I would only worry about buying +P brass if I were to identify a load in the +P territory. But I write notes and mark with a sharpie the identity of my loads.

 

[748]

Thank you since I have a pile of 9mm brass to work through, no need to pay alot just for more empties.

Yeah I have always marked date, projectile weight, projectile description such as plated, gold dot ect, propellant name with charge weight and primer.

 

[LiveLife]

USPSA shooters use regular brass for 9mm Major which pushes 124 gr bullet to 1450+ fps.

 

[jmorris]

My subsonic 9mm loads are almost always with regular range pickup, no problems in hundreds of thousands of rounds. In fact the last time I had a pistol brass problem it was with brand new brass.

 

[edwardware]

I would like to work up a load 9x19mm 147gr

Not that I'd suggest hotrodding that tiny case, but if you do you might sort by headstamp to reduce case volume variation.

 

[748]

I get enough to sort, usually load till I run out of that head stamp of brass.

 

[fxvr5]

Not that I'd suggest hotrodding that tiny case, but if you do you might sort by headstamp to reduce case volume variation.

That tiny case is fine with 'hot-rodding'. e.g. 9 Major.

 

[Walkalong]

But in general that is good advise for the average reloader, and the OP is just asking about +P.

 

[jmorris]

Not really “hotrod” loads, if you pick the right powders.


https://www.vihtavuori.com/reloading-data/handgun-reloading/?cartridge=89

With 3N38 even the starting load is faster than what the op wants.

 

[ATLDave]

USPSA shooters use regular brass for 9mm Major which pushes 124 gr bullet to 1450+ fps.

Yeah, but most 9mm major shooters are picky about headstamps. I try to stick with Winchester, the heavier FC headstamp, starline, and WCC. There are headstamps I'm perfectly happy to use for standard 9mm loads that I wouldn't be comfortable with pushing into major territory.

 

[LiveLife]

OP is developing carbine load and if blowback action, will bleed off pressure by pushing back on the bolt than locked breech action pistol used for 9mm Major.

Chamber pressure should be less of an issue as OP's load will no where get close to 9mm Major.

So use of regular 9mm brass should be OK.

147gr xtp ... subsonic in a carbine specifically for coyote assassination.

Do I need +P brass to get the projectile moving around 1,050 to 1,100 fps or no?

Shooting out of 16" carbine barrel will gain around 100-150 fps over pistol barrel, depending on powder.

Speer has published load data for 147 gr Gold Dot HP producing 1027 fps using BE-86 so out of 16" carbine barrel, achieving velocity of 1100 fps should be attainable even without using max powder charge - https://www.speer-ammo.com/download...m_caliber_355-366_dia/9mm_Luger__147_rev1.pdf

147 gr Gold Dot HP BE-86 1.130" COL Start 4.5 gr (936 fps) - Max 5.1 gr (1027 fps)

 

[ATLDave]

OP is developing carbine load and if blowback action, will bleed off pressure by pushing back on the bolt than locked breech action pistol used for 9mm Major.

So chamber pressure should be less of an issue as OP's load will no where get close to 9mm Major.

I was just following up the comment about what 9 Major shooters do... there's not 9 Major brass, but there are headstamps that can "take it" better than others. Although even the stuff that can't "take it" that well just becomes un-resizable (won't pass a case gauge after resizing). At least in my gun with my load. I can run 9 Major loads out of S&B brass.... once. Then that brass is toast.

 

[LiveLife]

Then that brass is toast.

And spent 9mm Major brass are left on the ground for unsuspecting reloaders to pick up to wonder why the resizing effort is much harder.

It would be nice if 9mm Major shooters perhaps mark the base with "M" to let other reloaders know.

But the way I see it, I am getting extra upper body work out (And I have done One Shot wet/dry myth busting here)

Now, when resizing effort is noticeably harder, I will check bottom of die to top of shell plate clearance and if I see daylight, I will check the brass in the tightest chamber barrel I have and will resize again if won't freely fully chamber and toss for recycling if fails after second resizing.

 

[ATLDave]

And spent 9mm Major brass are left on the ground for unsuspecting reloaders to pick up to wonder why the resizing effort is much harder. ...

Now, when resizing effort is noticeably harder, I will check bottom of die to top of shell plate clearance and if I see daylight, I will check the brass in the tightest chamber barrel I have and will resize again if won't freely fully chamber and toss for recycling if fails after second resizing.

I don't really notice resizing effort... I'm just talking about whether the portion of the case that is not reached by the die is expanded and can't be resized (regardless of effort) unless you have a roll-sizer.

I mostly try to stick with the "good" headstamps for the major loads, and those seem to resize just fine. So hopefully I'm not leaving too much "trash" brass on the ground.

 

[LiveLife]

So hopefully I'm not leaving too much "trash" brass on the ground.

I am actually getting very few "overly expanded" 9mm brass that cannot be resized with Lee die with tapered carbide sizer ring.

And if they can be resized, they seem to work OK for standard 9mm pressure loads.

 

[748]

If I load a 147gr load to 1,000fps in a pistol it should be about 1,100fps in a carbine, I don't think it will be P+.

 

[FROGO207]

I generally use plated brass for SD and +P loads as all my +P brass has been this as well. I have enough 9 MM brass there is no need to deal with those that will not size.

 

[mcb]

Buy a roll sizer and you can make it all work until the primer pockets are so loose the primers fall out.

 

[LiveLife]

If I load a 147gr load to 1,000fps in a pistol it should be about 1,100fps in a carbine, I don't think it will be P+.

Depends on the powder used.

 

[ATLDave]

Buy a roll sizer and you can make it all work until the primer pockets are so loose the primers fall out.

But $2k buys a lot of roll-sized brass from someone else! It's a big capital investment as reloading gear goes.

 

[MikeInOr]

I am glad to hear there is no difference between 9mm and 9mm +p brass. Different case volumes would mess up everything!

 

[mcb]

But $2k buys a lot of roll-sized brass from someone else! It's a big capital investment as reloading gear goes.

I probably should have used my facetious font/smiley. A friend has one but he also have four 1050's setup and running. He has a fair amount of disposable income I do not currently have...