RCBS Rock Chucker IV Primer Cup help - Page 1

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[ARCHIVED THREAD] - RCBS Rock Chucker IV Primer Cup help

Posted: 3/21/2013 7:10:50 PM EDT

i have a new RC IV and i hate the new primer catch cup that is on it and i want to know if the
old style horseshoe cup will fit it? the new Y cup is a major pain in my ass to remove and
sometimes when im trying to pull it out to dump it will jerk up and throw primers all over.

Posted: 3/21/2013 8:05:06 PM EDT

[#1]

Quoted:

i have a new RC IV and i hate the new primer catch cup that is on it and i want to know if the

old style horseshoe cup will fit it? the new Y cup is a major pain in my ass to remove and

sometimes when im trying to pull it out to dump it will jerk up and throw primers all over.

http://i54.tinypic.com/fwf9i.jpg

http://i250.photobucket.com/albums/gg272/dryflash3/Rockchucker/PC270344-1.jpg

That second pic looks familiar. I guess it should.

Posted: 3/21/2013 8:09:38 PM EDT

[#2]

sorry, just to lazy to take a pic of my Y cup and dont have the other one to take a pic of.
thanks

Posted: 3/21/2013 8:40:02 PM EDT

[#3]

You could just build a better one out of kydex like I did.

Posted: 3/21/2013 8:41:42 PM EDT

[#4]

I agree, the Y primer catch is a royal pain in my ass. Always pops off hard enough to throw primers all over the floor. Guess I could just use my shop-vac to clean the damn thing out.

Posted: 3/21/2013 8:52:41 PM EDT

[#5]

Quoted:

sorry, just to lazy to take a pic of my Y cup and dont have the other one to take a pic of.

thanks

The normal thing is to say whose pic you are using.

You are forgiven....this time.

Posted: 3/21/2013 9:05:28 PM EDT

[#6]

MPD444 can you post some nice close up pictures or email them to me?
and what is kydex? some sort of hard plastic?

Posted: 3/21/2013 9:27:50 PM EDT

[#7]

Kydex is a hard plastic that is moldable when heated, and keeps shape when cool. Its commonly used in holsters and knife sheaths. You can get it here
http://www.knifekits.com/vcom/index.php?cPath=41&osCsid=r624h8cemjuclfiuco0a8q51k7

Posted: 3/22/2013 3:46:49 AM EDT

[#8]

those photos are awesome, thanks!
what thickness kydex did you go with?

and can anyone answer my original question please?
can the old style horseshoe cup fit a new Rock Chucker Supreme press?

Posted: 3/22/2013 6:35:53 AM EDT

[#9]

Quoted:

those photos are awesome, thanks!

what thickness kydex did you go with?
and can anyone answer my original question please?

can the old style horseshoe cup fit a new Rock Chucker Supreme press?

You may not get an answer here. I don't have a new, won't prime Rockchucker.

I wonder if RCBS would know? 1-800-553-5000.

Posted: 3/22/2013 7:56:16 AM EDT

[#10]

I have the newer style "Y" primer catcher on my Rock Chucker. I slid a piece of styrofoam behind it like you did with wood, no issues. Occasionally a primer will pop out of the priming arm hole, but I don't have any issues taking it off and spilling primers everywhere.

Posted: 3/22/2013 9:54:11 AM EDT

[#11]

i just still want to know if the old cups work or not cause they just sit there and are easy to remove.

i might have to grind the little nubs off my Y catcher as they are whats hanging up when i try to pull it out to empty.

Posted: 3/22/2013 10:17:00 AM EDT

[#12]

Quoted:
i just still want to know if the old cups work or not cause they just sit there and are easy to remove.

i might have to grind the little nubs off my Y catcher as they are whats hanging up when i try to pull it out to empty.

Don't grind them off, just sand them down a hair at a time until they are snug yet easy to remove

Posted: 3/22/2013 10:17:37 AM EDT

[#13]

Quoted:
I have the newer style "Y" primer catcher on my Rock Chucker. I slid a piece of styrofoam behind it like you did with wood, no issues. Occasionally a primer will pop out of the priming arm hole,.....

I did this too, and worked better than stock.

Maybe not what you're looking for, but I got these for dedicated decapping:
Lee Reloader Single Stage Press and Lee Universal Depriming and Decapping Die.
I also got the Lee Breech Lock Hand Press. The thighmaster may also come in handy as a portable press.

A bonus is that the Rock Chucker is much cleaner

Posted: 3/22/2013 10:41:08 AM EDT

[#14]

i do like that lee single stage press and its pretty cheap, something to think about. but i wonder where the primers go? do they funnel out the other side?

i know im new to reloading but i dont understand how a universal depriming die works? it must just taper in and holds the outside of case and a rod
goes down through and pops the primer? unlike my sizing/depriming die that pops the primer and sizes the case.

Posted: 3/22/2013 10:47:53 AM EDT

[#15]

Quoted:
i do like that lee single stage press and its pretty cheap, something to think about. but i wonder where the primers go? do they funnel out the other side?

They catch in the base of the press, then dump them after a 100 or so....

i know im new to reloading but i dont understand how a universal depriming die works? it must just taper in and holds the outside of case and a rod
goes down through and pops the primer? unlike my sizing/depriming die that pops the primer and sizes the case.

A rod just pops out the primers. They are not supposed to break (but I have had some stubborn crimps).

Posted: 3/22/2013 10:57:26 AM EDT

[#16]

Quoted:
They catch in the base of the press, then dump them after a 100 or so....

i see that little hole where the primer would drop down the ram and into that hole.
is there a little tray sitting in that base or do you have to dig out the primers?

Posted: 3/22/2013 11:07:30 AM EDT

[#17]

Quoted:

Quoted:
They catch in the base of the press, then dump them after a 100 or so....

i see that little hole where the primer would drop down the ram and into that hole.
is there a little tray sitting in that base or do you have to dig out the primers?

I use 2/3 nuts and bolts to secure the press to a small piece of plywood, and undo them to lift off and empty. Plywood is clamped to my bench. Not much pressure involved

Posted: 3/22/2013 11:14:12 AM EDT

[#18]

so that press has a little cavity inside and it needs to be dumped out? thats a PITA

Posted: 3/25/2013 7:58:34 PM EDT

[#19]

still wanting to know if anytone has tried an old catcher with the new press, would really like to see a picture before i call into rcbs and wait to talk with someone.
or get some plastic ordered to make my own.

Posted: 5/2/2013 1:47:58 PM EDT

[#20]

i talked with a lady at rcbs tech to see if i can put the old horseshoe catcher on a new press that take the Y catcher and she said it wouldnt work, so that really sucks!
this new catcher has to be the dumbest design EVER!!! (tech lady even said it sucked) so i bought some kydex sheets and will cut them up, glue and bend them into some type of primer catcher and hopefully it will work good.

Posted: 5/2/2013 2:48:57 PM EDT

[#21]

DEFCAD has a new design that can be 3D printed.

http://defcad.org/rock-chucker-deprimer-tray-replacement/

And I completely agree with you. The primer catch tray on the supreme is terrible.

Posted: 5/2/2013 3:57:31 PM EDT

[#22]

Quoted:
DEFCAD has a new design that can be 3D printed.

http://defcad.org/rock-chucker-deprimer-tray-replacement/

And I completely agree with you. The primer catch tray on the supreme is terrible.

thats a pretty cool design and would be fun to try out cept i dont have a 3D printer.