Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

2378 Views 17 Replies 6 Participants Last post by Duhbob, Feb 28, 2011

Duhbob

Discussion Starter · Feb 22, 2011

Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

My flat nose RCBS ww 147gr.bullets look great and fly like a tipped pass from a bad thrower. I had temporarily lost my source for the functional/useable 136gr rnl bullets I am using now. So I had to do something...I ordered the $67 mold and cranked out 1,000 lead bullets...They suck!
I got my 136gr. source back so I can gladly say I am ok again BUT STUCK with a mold that I can't use.
The problem is KEYHOLING even at 20'. I tried N-340' N-350 and aa#7 also .356, and.355...nothing helps not lighter/heavier crimp or long or short OAL. I am loading pretty light stuff, like 133 power factor. Who wants to chime-in, anybody who loads lead 9mm from wheel weights ??

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Beladran

· #2 · Feb 22, 2011

Re: Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

Keyhole n at 20 feet? Wow you got issues!!! ASsuming the bullet is not out of round .... I might suggest a max charge of bullseye or 231

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Beladran

· #6 · Feb 23, 2011

Re: Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

i loaded up a bunch of 38spl with VV and was not real happy with the results.. i had lots of unburnt powder left in the barrel. I never had that kinda problem with bullseye or 231. what size do they drop out of the mold?

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Beladran

· #12 · Feb 24, 2011

Re: Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

hmm are you using straight WW's? To me if they are dropping from the mold at .357 and your sizing them down to .356. thats not much. you need to spike the mix with some extra tin to try and get them to at least .358
More tin and antimony makes them drop bigger and harder
More lead makes them softer and smaller but heavier

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Beladran

· #14 · Feb 24, 2011

Re: Keyholing: 9mm lead 147gr. rcbs flat nose/flat base

im still gonna opt for maybe more tin.. Your bottom right bullet the bevel base is not sharp and defined.. either mold was not to temp, its a glare, or you need more tin to get better fill out. Your grease groves look good on the otherones but it couldnt hurt to just double up on your tin and see what happens.

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