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barrel leading part deux
nemesisenforcer
Member Posts: 10,513 ✭✭✭
Took some lubed and sized 357 bullets out recently. They fouled up the barrel (a Rossi stainless 6" barrel) something severe.
The bullets were sized to .357 and lubed with Alox.
I've cleaned and polished the barrel with J&B bore cleaner and polish.
Hopefully that will solve the problem.
Planning on testing again tomorrow. I'll keep you posted.
The bullets were sized to .357 and lubed with Alox.
I've cleaned and polished the barrel with J&B bore cleaner and polish.
Hopefully that will solve the problem.
Planning on testing again tomorrow. I'll keep you posted.
Comments
edit polish will help but it should be ironed in by now. How hard are you pushing them?
Is it a new, relatively unfired bbl? Stainlees on the small scale tears rather than cuts.
Not new. Probably has around 2000 rounds through it.
Size to as fat as will chamber. .358-9 for preference. Don't use full end mag loads. Problems should then go away.
sizing them to 357. Using moderate loads, not close to full power mag pressure.
I thought the smaller bullets would be better since they wouldn't be as tight in to bore? Am I missing something?
Only got the Lee mold which throws 357-358 and the sizing die which squeezes down to 357.
I thought the smaller bullets would be better since they wouldn't be as tight in to bore? Am I missing something?
With cast bullets the EXACT opposite is true. A cast bullet .001 undersise will lead no matter how hard it is. Your bullets need to be .001-.002 over bore diameter. Get a .358 sizer die and behold the difference. A .357 mag can be ran at 1,000-1,200 FPS with out leading issues with good lube (Alox-beeswax) and wheel weight alloy as long as the bullet is the proper size.
quote:Originally posted by nemesisenforcer
Only got the Lee mold which throws 357-358 and the sizing die which squeezes down to 357.
I thought the smaller bullets would be better since they wouldn't be as tight in to bore? Am I missing something?
With cast bullets the EXACT opposite is true. A cast bullet .001 undersise will lead no matter how hard it is. Your bullets need to be .001-.002 over bore diameter. Get a .358 sizer die and behold the difference. A .357 mag can be ran at 1,000-1,200 FPS with out leading issues with good lube (Alox-beeswax) and wheel weight alloy as long as the bullet is the proper size.
see red above...issue solved...if you are running non jacketed
I don't have a 358 sizer die, but I'm thinking just hit the bullets with the Alox and don't size them?
I think those tumble lube lee's were not ment to be sized.
I've heard that, but I'm paranoid that there will be one bullet out of the batch that is oversized that will foul up the barrel if I don't squeeze it down.
Also, it depends on the mold type.
The SWC seems pretty consistently 357 all around, but the 230 gr. RN ball for the 452 has a base that comes out .456 or so, so they have to be sized.
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I use bullets sized at .358" out of my Marlin lever at just shy of 1800 FPS with no leading. BHN is 16-18. With cast bullets, proper fit is paramount.
GH1[:)]
1. What does your bore actually measure? It might be .452, it might be .454, or really anything. Unless you slug it it's a mystery. Remember, ideally cast bullets should be sized 1-2/1000 over bore diameter.
2. Let's say it is .452 and the bullet is .456". 4/1000 of an inch oversize means that the bullet is only oversized on each side by 2/1000". In the overall scheme of things, that's VERY VERY small.
If it chambers freely with a Lee TL design, blast away.
As for charliemeyer's opinion... just shows how wide a world of experience there is out there. My Lee molds produce some of my most accurate shooting bullets.