FL Sizing Problem

[JFrank]

Guffy - "I realized the philosophy of the case having resistance to sizing is a very though sell." ...means what?

If the die, in the frame isn't square to the ram there is a problem with the press. When you put in the shell holder you introduce wobble in the head of the ram to shell holder fit. Unless you are trying for extreme accuracy at 1K yds it matters not. Trying for extreme accuracy at normal hunting distances is an exercise in frustration, because the gun can already shoot better than the shooter.

That said, it is man's inherent drive to tinker with things.

It means that people want to argue about it

 

[PWC]

It means that people want to argue about it

Some more than others....

 

[JFrank]

Some more than others....

Not me, I’m with Guffey ( most of the time)
J

 

[fguffey]

I would like to see a picture of that Limiter please.
Also could you please share those RCBS instructions? I’ve searched high and low with no joy.

I have shared, I sent a bundle to UNCLENICK, I have never thought it was healthy for reloaders to agree with each other, I do believe they should have the same source. I also shared Herter Catalogs and information from Easton/Ackely, the information from Easton/Ackley would seem small and insignificant and easy to miss. Access to the information is limited to Google, when I apply methods and or techniques by Easton/Ackely I am accused of being 'into something risky'. When I explained to SEAWEED my thoughts he said he did not think 'of that'.

See a picture? I have no problem crawling under the press while the press is mounted to a stand or bench, because I have Rock Chuckers that are not mounted I find it very easy to turn it over and look for the shiny spots on the linkage. ,

http://www.manualsdir.com/manuals/593103/6/rcbs-rock-chucker-supreme-press-page6.png

The toggle block hits the right linkage arm; the ram has no choice but to be pushed back.

F. Guffey

 

[JFrank]

Thank you
I have three presses non are rock crushers.
My old rcbs RS due to the linkage design is my favorite, a Harrell’s compact I travel with and an RS-3 I’ve recently acquired but haven’t used yet now that appears closer to a rock design but that I will need to study before I make it part of my bench permanently.
Jim

 

[fguffey]

some more than others.

I have suggested reloaders run the ram up and down without a die installed in the press. I have suggested it is possible to observe the travel of the ram whole lowering and raising the handle; . I have suggested the reloader observe the travel of the ram when the handle hits the bottom its travel. When the toggle hits the right linkage arm the toggle goes into a bind leaving the ram no place to go but back. Deductive reasoning says if the ram is pushed back at the tottom the top of the ram has no choice but to move forward (making it impossible for the rock Chucker to cam over). From the beginning the Rock Chucker was not a bump press because it did not cam over.

About 6 years ago a reloader went to Cabela's with his video camera; by accident he noticed the top of the ram kicking forward when the ram was raised. As expected he posted the video on reloading forums, members of the forums decide it was the Chinese RCBS press. I decided none of the members had a Rock Chucker because all of my Rock Chuckers kick the ram forward when the linkage gets tangled.

EXCEPT: When I have a case in the shell holder and there is a die installed because the case prevents the ram from being kicked forward. AND: I can modify a Rock Chucker to cam over.

F. Guffey

 

[AFDoc]

Update!

I sorted all the brass by head stamp. Using a couple of pieces of brass, I set the Redding FL die to give me a length of 0.001 over SAAMI minimum as measured by the instant indicator. I FL sized and measured the first 20 pieces, and they were all within +/- 0.001” of my desired length. I was satisfied with the test run, so I proceeded to FL size 500 pieces with the same head stamp. I measured every 5th piece, and again, I observed measurements within +/- 0.001” of my desired length.

So far so good. Sizing by head stamp has been a success.

 

[Blue68f100]

I would only size the min required 0.001"-0.002" for bolt, 0.002"-0.003" for simi-auto, to fit your gun to keep from over working the brass. Some chambers are so generous sizing back to SAAMI spec over work the brass.

Glad you got the sizing consistent. Different mfg use different alloys which makes them all work harden at different rates, as well as what's done in mfg. Annealing them all would allow you to run mixed head stamps, since all will be in the same state.

 

[AFDoc]

I would only size the min required 0.001"-0.002" for bolt, 0.002"-0.003" for simi-auto, to fit your gun to keep from over working the brass. Some chambers are so generous sizing back to SAAMI spec over work the brass.

Glad you got the sizing consistent. Different mfg use different alloys which makes them all work harden at different rates, as well as what's done in mfg. Annealing them all would allow you to run mixed head stamps, since all will be in the same state.

The brass was free, so I have no sunk cost there. Maybe I will reload the brass one more time? The other issue is I plan to build two new ARs this year. Because I have no way of predicting chamber headspace for these new rifles, it’s all the way down to just over SAAMI minimum with these cases!

I’m a big fan of annealing brass. After de-priming and wet tumbling, all of these cases all got to take a trip through the Annealeez. I thought that should take care of any brass inconsistency as well, but I was wrong. Failure to sort the brass by head stamp prior to FL sizing appears to have been the primary problem.