KYregular
Member
- Joined
- Jan 4, 2018
- Messages
- 760
So I loaded up my first cast and powder coated bullets and ran them over a chrono today.
CZ P09
124 grain round nose flat points
BE86 powder 4.6, 4.8, 5.0 grains
OAL 1.10
Sized at .356 and .357
4.6 1050 fps SD 15 .356 sized
4.8 1104 fps SD 7. 356 sized
5.0 1138 fps SD 8 .356 sized (great group)
Didn't try many .357
My issue is that:
1) .356 had trouble going into battery. 357 was worse. Though all passed initial plunk test, when I took the dirty barrel and tried, they would not. Had "blue" build up on the lands. Ran a brush thru and they plunked fine. In the pic you will see a build up around the case mouth. Could I have had too much powder on them when I baked them? Should I try extra taper crimp? Should I try sizing down to .355 (which my barrel slugged at?) Cannot find a Lee .355 sizer anywhere. All input appreciated.
CZ P09
124 grain round nose flat points
BE86 powder 4.6, 4.8, 5.0 grains
OAL 1.10
Sized at .356 and .357
4.6 1050 fps SD 15 .356 sized
4.8 1104 fps SD 7. 356 sized
5.0 1138 fps SD 8 .356 sized (great group)
Didn't try many .357
My issue is that:
1) .356 had trouble going into battery. 357 was worse. Though all passed initial plunk test, when I took the dirty barrel and tried, they would not. Had "blue" build up on the lands. Ran a brush thru and they plunked fine. In the pic you will see a build up around the case mouth. Could I have had too much powder on them when I baked them? Should I try extra taper crimp? Should I try sizing down to .355 (which my barrel slugged at?) Cannot find a Lee .355 sizer anywhere. All input appreciated.