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Post by Deleted on Sept 5, 2014 23:18:59 GMT -5
Rambler, great shake test you did with the .040" bushing! If your guys WANT to get 4198 through the .040" bushing, size your full form bullet so you need a jack hammer to push it down the barrel. Then you'll get a couple of grains to come through the .040" bushing.
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Post by rambler on Sept 6, 2014 6:41:49 GMT -5
Rambler, great shake test you did with the .040" bushing! If your guys WANT to get 4198 through the .040" bushing, size your full form bullet so you need a jack hammer to push it down the barrel. Then you'll get a couple of grains to come through the .040" bushing. Thank you.
Even a blind squirrel can find an acorn once in a while. Even if the 4198 granules are slightly smaller I believe its not enough to allow them thru the orifice.
Keep in mind this shake test was with IMR4198, I do not have access to H4198 down here.
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Post by rambler on Sept 6, 2014 7:42:25 GMT -5
Just did the shake test with SR4759 and no leakage whatsoever. I believe the 4759 may be slightly larger in dia. than the 4198. It's shorter in length so now way could I measure it with my calipers. Maybe with 4198 having longer granules that's what's keeping it from lining up and getting down into the .040 hole, even tho it may be slight smaller in diameter. Either way I am confident it won't be a problem, in my gun anyway. A side bar to all that, my breech plug is by SMI, the measurement between the bottom of the primer holder and the top of the tungsten bushing can't more than .250. My hole in the breech plug is only 9/64 so I may not be able to enlarge that. Granted I've only shot it 3 times but no primer bulging, spent primers came out fine. I'll have a better idea later this month and later this winter for duplex loads as well. That's my story and I'm sticking to it.
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Post by ET on Sept 6, 2014 15:56:45 GMT -5
Rambler
I call that ingenuity for a basic test. That approach may prove useful in determining when a specific orifice size is reached that begins to show when powder begins passing through. Mind you that may take a while with the new bushing material.
Nicely done.
Ed
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Post by rambler on Sept 6, 2014 17:13:30 GMT -5
Rambler I call that ingenuity for a basic test. That approach may prove useful in determining when a specific orifice size is reached that begins to show when powder begins passing through. Mind you that may take a while with the new bushing material. Nicely done. Ed Thank you
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