PMC Bronze 170gr JHP Pull-down

[RDub01]

Found some of these at a local shop..



Cartridge is from Ammo Manufacture:  PMC 170gr JHP

Muzzle Velocity; Advertised:   1200 fps
Actual Instrumental Velocity:  1104 fps  57°F
Muzzle Energy; Advertised:  543 ft/lbs



Brass Make/Head stamp:    PMC  10mm AUTO

Bullet Make/Weight/Construction/Info:   PMC  170gr  JHP
Dia;  .3995"  Length;  .612"
Actual Weight:  170.0grs.









Crimp diameter:   .4218"
C.O.A.L.:   1.255"

Primer:   Brass color



Case:  Brass
Length; .986"  Base Dia;  .4228"   Weight;  78.1grs w/primer



Powder Description/Positive ID/Type/Charge Weight:  9.2grs;  Flattened Ball








Skyscreens centered 10' from muzzle


Case expansion was minimal;  .4326", .4322", .4322", .4318", .4327"

[The_Shadow]

The powder seems to fit a charge for Accurate #7 by weight and yield.
Thanks for the documentation, Rdub01   

[RDub01]

Hey Shadow
I haven't worked with this bullet weight much at all, but I'm looking at Western's data for a 165gr jacketed bullet and they show;

AA #7;  start 10.8grs max 12.0grs.
AA #5;  start 8.7grs   max 9.7grs.

They don't list a 165gr load for Silhouette.

This load contained 9.2 grs. and was a  fairly stout load.
I'm thinking this powder has a burning rate closer to AA #5.

[The_Shadow]

Wester manual 6.0 shows
170gr Winchester  using Silhouette 7.9 grains @ 1165 fps and 9.1grains @ 1285 fps  (way over your velocity)
180gr Hornaddy XTP using A#7 9.6 grains @ 1041 fps (close considering bullet weight it would be a little faster) and 10.7 @ 1183 fps
180gr Hornaddy XTP using A#5 7.8 grains @ 1053 fps and 8.7 @ 1197 fps

Winchester 571 powder shows a 170 grain JHP using 9.0 grains @ 1060 fps and 10.2 @ 1170 fps (not sure if this powder is around any more...HS-7 was the same)