Parabellum Research PBR 180 grain pull-down

[The_Shadow]

Cartridge is from Ammo Manufacture: Parabellum Research PBR 180 FMJ
Ballistics Information:
Muzzle Velocity: 1302 fps
Muzzle Energy: 677 ft. lbs
Pictures: Before/After disassembly:
Brass Make/Headstamp: Star Line - Brass
Bullet Make/Weight/Construction/Info; Length 0.5975"/Dia.0.400" Copper Jacket 180gr. FMJ actual weight 179.6 grains exposed lead base
C.O.A.L.: 1.2525"
Case: Diameter 0.4215" Crimp Diameter 0.4205" Length 0.9900"
Primer: Brass color
Powder Description/Positive ID/Type/Charge Weight: Accurate Arms #9 14.6 grains
Tested 11/29/2012 PBR-Parabellum Research 180 Gr. FMJ 1354 fps : Diameter 0.4275"  primer slightly flatten

[REDLINE]

I believe you're correct about No. 9.  IMO the only other remote possibility would be Ramshot Enforcer.

Awesome work The_Shadow!  Thanks much for sharing it with us.

[The_Shadow]

Your welcomed!  But Intercooler has made this possible by suppling the sample of ammo to work with...

[Intercooler]

I threw in those DoubleTap .357's too didn't I? I wish I saved a couple of the newer once I just tested to see if the charge was different.

[The_Shadow]

Yes you sent a 125 & 158 grain DT 357, I'll pull those last, I;\'m trying to finish up the 10mm stuff while the dies are setup to reassemble the rounds to spec for the Chrony testing.  BTW Underwood is posted.

[Intercooler]

Cool. You know what would be another cool picture is seeing all the powder in the brass so we know how much room is left. No biggie though!

[REDLINE]

And a HUGE shoutout to Intercooler for supplying the ammo for disecting to The_Shadow!!!

[Intercooler]

This is a FMJ as opposed to a TMJ right? In a TMJ the bottom is covered as well right?

[REDLINE]

A FMJ bullet sometimes has copper jacket covering the base of the bullet, but more commonly in rifle bullets.  If I'm not mistaken, Speer is the only company that labels any bullet as TMJ.  If that means they are the only bullet manufacturer that makes a FMJ bullet for pistols where the copper covers the bullet base too, I'm not sure.

[Yondering]

Montana Gold sells TMJ (or CMJ?) bullets also; they are just like their FMJ bullets, but with a copper washer crimped in the base, no exposed lead. Exposed lead = FMJ.

[Intercooler]

The 180 FMJ V-Supreme is rated 1302 FPS/ 677 LBS and gave 1336 FPS actual in testing... if you want to change it. The Premium Line HP version is rated 1265 but gave about the same results.

[The_Shadow]

Cool. You know what would be another cool picture is seeing all the powder in the brass so we know how much room is left. No biggie though!

It would but trying not to knock them over and have it spill while taking pictures, writing the documentation notes presents challenges.

I also make the changes about the velocity and energy that you provided, I was gathering the info off the websites not knowing which was which...

[Intercooler]

Was this #9 or do we need to take some more photos?

[sqlbullet]

14.6 grains of #7 would be an extremely hot load IMHO.  Just the charge weight alone makes it #9 or a VERY similar bulk powder as I see it.

[The_Shadow]

Well I'll try this again...the first try was accidently closed before it posted...Got to hate when that happens!

PapaJohn posted a picture of his AA#9 and it sort of confirms what others have said about the powder looking different, having more flattened ball structure as opposed to spherical ball like my 2008 batch.  RamShot Enforcer is very simular spherical ball powder with very simular performance.  You can also reference the burn rate tables for simular powders...http://www.hodgdon.com/burn-rate.html to see what's close.

PBR is using a 180grain FMJ in this loading claming 1302 fps...to fit this in a powder's profile the powder charge for the yield (work being done = bullet weight at velocity), while generally fitting the SAAMI MAP.
Accurate load data 203-1  edition 3.1
No.9 180gr HDY XTP 12.2gr 1,093 fps - 13.5gr 1,242 fps 34,100 psi COAL 1.250"
No.9 180gr RAN HP 12.1gr 1,086 fps - 13.5gr 1,235 fps 35,500 psi COAL 1.260"
No.9 190gr SIE FPJ 12.8gr 1,115 fps - 14.2gr 1,267 fps 35,800 psi COAL1.250"

Now PBR's bullet is a 180gr FMJ, these are physically shorter than a HP design this would allow for slightly more powder at the same pressures.  In the example of the 190 Sierra FPJ (same as FMJ) but it is longer bullet (not by much) than the PBR's 180gr FMJ bullet.  At PBR's 14.6 grain powder charge this limits many powders by weight used for the yield.

I compared this to my samples of Hodgdons H-110 and Winchester 296, they look different, they are slower burn rates, they also require a hard crimp to maintain performance (hard to do with 10mm's with no cannelure and headspacing on the case mouth). 
Winchester load dat shows this for 296...296* 180JHP 12.6grains 990 fps 22,400 psi
*Note: 296 powder is considered to be one of the best powders for use in magnum handgun cartridges. Please refer to page
for recommended primer and use a very heavy crimp. Failure to follow this procedure could result in poor ignition and/or
squib loads under extreme circumstances, particularly in loads where less than 90% of the available powder space is being
used (low loading density).

ADI shows a powder (AR2205) in their load tables that might fit, but this is an Austrailian powder and I have never seen any yet.

So inconclusion, the podwer has to fit the profile for the amount of powder being used and the work being done and the SAAMI MAP.  AA#9 fits this situation.