Norma 200 grain FMJ Truncated Cone (ORIGINAL) Pull-Down

[The_Shadow]

Cartridge is from Ammo Manufacture: Norma 200 grain FMJ Truncated Cone
Ballistics Information: 10mm Auto
Muzzle Velocity: 1200 fps
Muzzle Energy: 639 ft. lbs
Brass Make/Headstamp: Norma – Brass (case weight w/primer 77.2 gr. / 79.2 gr.)
Bullet Make/Weight/Construction/Info; Length 0.6780"/Dia. 0.4000": 200gr Norma FMJ
Actual weigh 200.6 / 200.0 grains  Crimp Diameter 0.3995"
Meplat 0.2620"  Bullet base (concaved exposed lead core)
C.O.A.L.: 1.2485"
Primer: Nickel color
Case: Diameter 0.4230" Crimp Diameter 0.4225" (tight) Length 0.9890"
Powder Description/Positive ID/Type/Charge Weight: ? NORMA R-123 ?  9.6 / 9.8 grains
Tested Velocity:

(short rod shaped, some golden and some darker, some rod are perforated hole in the middle)
(Vihtavuori Powders exhibit many of these characteristics)















Modified for addition data Pulled a second cartridge that was heavier to inspect differences.

[The_Shadow]

The 9.6 grains charge weight is less powder than what was shown in the NORMA loading book...

In another calculation estimated 10.5 grains, but they showed the casing with primer as 79.2grains. That is 2.0 grains difference.

I may pull another to see if there is some heavier charge weights...

After I get the tested velocity, we may see more...

Total cartridge weight
287.6 Case was 77.2, Bullet was 200.6 gr. as pulled
286.8
287.6
286.6
289.2 Case was 79.2, Bullet was 200.0 gr. as pulled diff 1.6 grains

[Intercooler]

  Very interesting. So what should we call the charge 

I know when I Chronographed the 170's they were kind of up and down. Hmmmm.... maybe not that tight on the loading back then?

[4949shooter]

Probably because they were cracking the frames on the Delta Elites back then.