Had an extra synapse fire yesterday and came up with dirt simple way to modify one of the Redding powder measures to have greater resolution when adjusting for a desired charge.
Made a steel bushing to insert into the 3/4" rifle measure port in the drum of the powder measure. Decided to make the new piston 3/8" diameter. This should double the resolution of the Redding micrometer scale. Here is the drum and the bushing ready to be assembled.
Bushing was made from 3/4 hot rolled steel barstock. Knocked some of the scale off in the lathe for a snug slip fit. The bushing will be held in place with Loctite RC609, which is a press-fit adhesive. I bought this stuff back in the 80's after the harmonic balancer flew off the crank on my '61 Vette. It will take up to 0.006 diametral clearance. So, it works with both press fits and slip fits. Adds 3000 psi of holding force. Sets in a few minutes and then takes 6 hours to fully cure.
But I'm not a patient boy. So, I loaded .30-06 rounds for Sunday's match and then put the drum in the lathe to machine the bushing flush.
Ended up stoning the last few tenths off. I think the body of the measure is worn a little as it only dragged in one spot. Good to go.
Just finished a sandwich for a late lunch. Will now do back down and machine the piston to fit the 3/8" bore in the modified drum. Nice think about the Loctite, is it is not permanent. I can return the drum back to normal. Only the piston mod will be permanent. But if I had to, I could repair the piston.