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Where's the beef?
I'll start with this as opposed to the McD's straw. I have one on the way as well. Thanks for the tip!
RCBS Chargemaster problem
- Thread starter Todd S
- Start date
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I'll start with this as opposed to the McD's straw. I have one on the way as well. Thanks for the tip!
- Feb 4, 2013
- 28,175
I have posted about this before.
The problem is, you need to break up the small clumps. To do so, you need grooves that run the length of the tube, not a spiral.
I took a pen barrel and sanded it until it was a snug fit in the Chargemaster tube. Then used a hobby coping saw to cut longitudinal grooves on the inside of the tube. 6 or 8 will do. Try to space them evening.
After doing this, I get maybe one over per 50 plus charges with Varget or H4895. Prior to this mod, I got about 1 per 5 charges.
The problem is, you need to break up the small clumps. To do so, you need grooves that run the length of the tube, not a spiral.
I took a pen barrel and sanded it until it was a snug fit in the Chargemaster tube. Then used a hobby coping saw to cut longitudinal grooves on the inside of the tube. 6 or 8 will do. Try to space them evening.
After doing this, I get maybe one over per 50 plus charges with Varget or H4895. Prior to this mod, I got about 1 per 5 charges.
deerassassin22
Active Member
I just came home here are, the picture of how I set my scales. I take a USED dryer sheet and wipe down the inside of the cylinder prior to pouring in my powder.
After this, I'm also ordering the inserts from Snipers Hide here is the link:
http://forum.snipershide.com/threads/chargemaster-reducing-insert.6254583/page-2#post-7299328
After this, I'm also ordering the inserts from Snipers Hide here is the link:
http://forum.snipershide.com/threads/chargemaster-reducing-insert.6254583/page-2#post-7299328
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- Feb 4, 2013
- 28,175
I saw those when they were introduced.
They don't have anything to break up the small clumps that cause the overshoots.
I carefully watched mine operate, and every time I got an over weight charge, a clump of several granules of powder fell as one.
They don't have anything to break up the small clumps that cause the overshoots.
I carefully watched mine operate, and every time I got an over weight charge, a clump of several granules of powder fell as one.
I have a Lyman that came with a little screw-in insert just for this. It's most useful on extruded stick powders like most of the IMR line. When I mislocated it in the drawer, Lyman sent me one free.
The insert makes the difference of throwing 3 out of 5 IMR 4xxx charges over to seldom getting a .1 grain off. I think one for the RCBS would do something similar.
With flake and ball powders it works better without the restrictor. With longer sticks, I can't live without it.
The insert makes the difference of throwing 3 out of 5 IMR 4xxx charges over to seldom getting a .1 grain off. I think one for the RCBS would do something similar.
With flake and ball powders it works better without the restrictor. With longer sticks, I can't live without it.
KRC
Active Member
Clumps???
- Feb 4, 2013
- 28,175
2, 3, 4 or so granules of powder that are sticking together.
When the tube rotates to drop a tiny bit, the whole clump falls, and you are 0.1 - 0.2 grains over.
What I found was, using longitudinal grooves, those small lumps got broken up, so the unit could dispense a single granule of powder.
KRC
Active Member
Just to be clear, you do not have real "clumps" of powder granules stuck together, but just that several granules fall at the same time?
Do you have an image of your longitudinal grooved tube you could share?
Is it possible that the reduced diameter of the tube may be responsible for the increased precision, rather than the longitudinal grooves?
Do you use this tube with any other Chargemaster modification?
My issue with the Chargemaster is not that it overthrows too often, as this was minimized with a piece of tape with a smaller hole placed over the hole on the feed tube. The issue I have is that charges that read as correctly dispensed can vary widely. "Widely" being + or - 6 granules of powder within 10 throws. (Sometimes even more.) This results in charges that have a weight differences greater than 0.1 grain.
I have just received the insert reducer mentioned in this thread ($17.99 w/ shipping on eBay) and will be using it over the next few weeks to determine if precision tightens up.
Do you have an image of your longitudinal grooved tube you could share?
Is it possible that the reduced diameter of the tube may be responsible for the increased precision, rather than the longitudinal grooves?
Do you use this tube with any other Chargemaster modification?
My issue with the Chargemaster is not that it overthrows too often, as this was minimized with a piece of tape with a smaller hole placed over the hole on the feed tube. The issue I have is that charges that read as correctly dispensed can vary widely. "Widely" being + or - 6 granules of powder within 10 throws. (Sometimes even more.) This results in charges that have a weight differences greater than 0.1 grain.
I have just received the insert reducer mentioned in this thread ($17.99 w/ shipping on eBay) and will be using it over the next few weeks to determine if precision tightens up.
deerassassin22
Active Member
I just got mine a few hours ago sitting here running both my machines for 41rnds so far no over throws. Mine has the factory programming no issues.
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