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« on: August 26, 2016, 11:10:28 pm »
I wrote a post about powder bridging while loading .38 Special about a month ago. I thought the problem was due to the extremely light density of WST powder.
Well Last night I was loading some .45 ACP rounds for practice. I was dropping 4.2 grains of BE powder. I filled the hopper when I began loading that night. I poured the powder through a funnel into the hopper to the height of 6-7". This hopper is the Lexan that is clear with factory powder funnel.
I confirmed my weight 3 times and they were right on. I began loading and was checking to make sure powder was going into the cases about every 20 rounds for the first 80 rounds. I checked again at about the 130th round and NO powder in the cases. I had to pull approx. 40 rounds.
I first thought if the powder was bridging there had to be a void in the hopper. I took the primer tube and pushed down on the powder in the hopper. Nothing. I removed the head and worked the powder slide manually and no powder. I began to pour the powder back into the 1 lb. container. The first 3 inches from the hopper poured naturally and then the powder stopped,. About three inches of the powder would not pour out of the hopper by gravity alone. It did not take a lot to break the remaining powder loose but it needed assistance to break it loose..
The powder was poured out of a factory 1 lb. container,through a funnel with a hole of 3/8 to 1/2" hole. No lumps were noticed when pouring the powder into the hopper originally. The powder has been stored in my man cave that is heated and air conditioned. The container has the factory foam seal intact. The problem occurred after the powder was poured into the hopper within 45 minutes.
The previous 300-500K rounds I have loaded have been fine. But in the last month I have had this happen with two different powders,on two different Star presses,loading two different calibers.
Any Ideas on cause? Static electricity, Humidity,Temp change,Aliens,George W Bush