Time to get the scrub brush out... Looks like leading to me... Most common ways to get that is to much powder, or a bad fitting bullet.. Alloy can also be a factor... Get the brushes out...
It is hard to tell from your picture. Try running a patch soaked with Hoppes #9 through the barrel and let it sit for a few minutes. Then swab it out with clean patches. If the streaks are gone, its probably not lead.
I am pretty sure its lead, but it is hard to tell for sure. If you could use a real didital camera, that would help. Sure looks like lead to me.... If it is lube, i would be removed with a standard copper barrel brush pretty easily in my experience. It it is lube, it is dang hard, time to switch to johnsons paste wax and bee's wax 50/50 with a colorful crayon thrown in for color.
The copper barrel brush will remove the material. The lube im using is the Johnsons paste wax/ Lee allox and mineral spirits. The last pic is taken with a digital camera. The problem im having is if i insert a bore light into the end of the bore it lights the barrel completly and you cant see the material slicking the rifleing, it causes it to appear like a clean barrel. So im having trouble getting pics with natural light in the end of the barrel. What would happen if I ran a dozen or so unlubed rounds through the gun? Guess that would let me know for sure if it was the lube or not.
Looks clean enough to me. Get it spotless, you will have to shoot a bunch to recondition the bore. I have no idea how long it has been since I've cleaned any of my barrels. Years for some, I'm sure.
The solid soft lead bullet is undoubtably the best and most satisfactory expanding bullet that has ever been designed. It invariably mushrooms perfectly, and never breaks up. With the metal base that is essential for velocities of 2000 f.s. and upwards to protect the naked base, these metal-based soft lead bullets are splendid.
John Taylor - "African Rifles and Cartridges"
Forget everything you know about loading jacketed bullets. This is a whole new ball game!
it looks like it is slight leading prolly because of not enough lube.
ask me how i know
I've got metallic looking grey gunk on my bolt face and even some places in my slide. Im almost convinced its lube all in my gun.
The real question is how does it shoot? If that's a little lead or antimony wash, and it doesn't keep building up to an unacceptable level where accuracy goes south, don't worry about it. If it isn't any worse than that after, say, 1-200 rounds, I'd forget about it. Run a patch through it once in a while and call it done.
Gear
that does look like some leading to me.
the lube isn't to blame..
look to diameter for the real culprit.
The only thing comfusing me is the metallic gray gunk on the bolt face. How could lead get there
You might not have belled your cases quite enough and shaved a lead ring while seating the bullet. If not noticed and left hanging on the case mouth when you shot the I think it could stick anywhere in the barrel.
Nope i made sure that didint happen im inspecting these cratridges so much im loading maybe 50 an hr. Im being veey carwful since these r my first rounds
gas cutting.
and the cases are work hardened they ain't sealing.
try another bunch of brass and see what happens.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |