I know.... Another dimple thread....

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Mar 28, 2013
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407
Location
Kalispell, MT
So I did a bad thing and bought a new 7PRC and with that I needed to set myself all up reloading wise for that caliber. I bought all new dies, 100 Peterson cases, and several high BC bullets to try. I am a 7mm RM fan and have several I reload for but nothing over 160grain and whats the fun of not at least trying some high BC stuff right?

Anyways the dies I bought were Redding Master Hunter. And I seated the pre-sized Peterson brass flawlessly. I loved that die and want to get more of them for other calibers. I went to run the sizing die for the first time 2 weeks ago and about pulled my hair out. Mind you I have been reloading for 25 plus years and for 30 some calibers. Im not perfect and have had a dimple pop up here and there. Nothing a little cleaning of the die and back off on sizing lube......

Well I cleaned the die and tried again. Same thing. I got through 7 or 8 cases and gave up. Cleaned the die 3 times and tried 2 different lubes. I walked away as I was getting to frustrated. Fast forward to today. I scrubbed the sizing die. Sprayed it with brake clean, used different size brushes to make sure I was getting the different areas. then went to reload again.

First case dimpled. I'm using imperial sizing lube so I tried some Hornady spray lube. Same thing. Cleaned the die again, THROUGHLY! Started with no lube, couldn't get the case in 20%. Added just a little Imperial to just the body, hardly any. Could only get it in about 40% of the way. Added a bit more, and got to about 70%. Mind you I am using way less then I ever have. Anyways I finally got it to size and it dimpled. I worked my way though 50 cases all of which dimpled. I also tried many times without the depriming stem. No change either.

Extremely Frustrating and produced the worst loads I have ever seen come out of my reloading room by far.

Ok guys bare with me, I know we have all seen the dimple posts everywhere and 99% of the time its too much lube. I believe this might be the case but I tried several times with several pieces of brass on a fresh clean with extremely little lube and couldn't get them to cycle. Could this be a bad die that's maybe to rough? Does that even happen? It looked normal to the naked eye.

Just to prove to myself I sized 50 .243 right after without a hiccup, sized like butter with no dimpling and little effort. Also in RCBS dies which is almost all I own. This is the first time I have used Redding and for the price I paid for the dies I cant same I'm impressed with the set.... I love the seating die however.

Any advice from the gallery?
 
I had the same thing happen with a Redding sizing die for a 300 Norma. Tried different lubes to no avail as well as cleaned it to no end thinking same thing that I had too much lube on the brass. Ended up emailing Redding and sending them the die back with a piece of fired brass. They ended up sending me a new bushing sizing die and problem went away but I never heard why that die was dimpling the shoulder on my brass.
 
I had the same thing happen with a Redding sizing die for a 300 Norma. Tried different lubes to no avail as well as cleaned it to no end thinking same thing that I had too much lube on the brass. Ended up emailing Redding and sending them the die back with a piece of fired brass. They ended up sending me a new bushing sizing die and problem went away but I never heard why that die was dimpling the shoulder on my brass.
See my post above
 
How does one go about this?
It’s not a real simple job, you have to locate a spot about midway on the shoulder and drill a pretty small hole, about 1mm is good.
See Skips post above, obviously Redding are aware of the problem, a bushing die will allow trapped air to escape, that’s probably the easiest approach
 
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