(https://i.postimg.cc/zDt34qqp/DSC01671-resized.jpg) (https://postimages.org/)
Cartridge is from Ammo Manufacture: SigSauer 180gr V-Crown JHP
Muzzle Velocity; Advertised: 1250 fps
Muzzle Energy; Advertised: 624 ft. lbs.
Brass Make/Head stamp: SIG 10mm AUTO
Bullet Make/Weight/Construction/Info: 180gr V-Crown JHP .4000" dia; .613" long
Actual Weight: 179.9grs
Crimp diameter: .4210"
C.O.A.L.: 1.247"
Primer: Nickel color
Case: Nickel
Powder Description/Positive ID/Type/Charge Weight: Flattened ball; 8.5grs.
(https://i.postimg.cc/VN8NX6Fs/DSC01673-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/G23hS5NZ/DSC01674-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/0N0ynstY/DSC01675-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/P5ZxLZYF/DSC01676-resized.jpg) (https://postimages.org/)
(https://i.postimg.cc/rFDzk7mT/DSC01672-resized.jpg) (https://postimages.org/)
Actual Instrumental Velocity: 1165 fps
(https://i.postimg.cc/RV2hVG6H/Sig-Sauer-180gr-JHP.jpg) (https://postimages.org/)
Shot from a stock Glock 20-SF at 25 yards. Target 5½"
Data taken with an Oehler Model 33. Skyscreens centered 10' from muzzle.
Head expansion; .4342", .4333", .4334", .4341, .4338"
Velocity is about what one would expect from 8.5grs of propellant.
Wow Dub01, that is a different loading than the previous 180 gr V-Crown pull-down.
This one appears to be AutoComp.
Hodgdon shows the 180 JHC with 7.7 as 1199 fps 36,000 psi.
I have read that people are having some pressure signs in the newer loads...did you see any pressure signs?
Hey Shadow
I included the head expansion measurements.. They were right up there, to where I would stop if I were working up loads.
Yep, 0.4340" is a full expansion in my G-20SF and G29 factory barrels...I'll have to test some AutoComp loads to see how they compare.
Saturday's Vcrown testing:
G20 LW 5.15" .4291 1,258 fps 56 degrees
G20 stock 4.6" bl .4337 1,192 fps 76 degrees
I've got Autocomp, maybe I'll ladder up to the V-Crown factory load.
Can I trade for some of these?