Type "S" bushing die question

[stagpanther]

I've started a 6mm predator AR build (still waiting on the barrel)and since no production dies are available I decided to go with a redding grendel bushing die--and replaced the expander ball with acarbide 6mm expander and bought the .268 bushing to resize the neck. This is my first go with bushing dies, so this is new to me. Here is my very first case (a heavily used grendel case, as you can see) and as far as I can tell, I think I did it right.



The directions that come with the die say after inserting the bushing and dialing down the decap rod to then back the decap rod out 1/16 of a turn, presumably to enhance the "self-centering" of the neck resize. What I'm not quite sure of--does this result in a slight "radius" at the base of the neck where the shoulder starts--and is that "normal?"

 

[Metal god]

--does this result in a slight "radius" at the base of the neck where the shoulder starts--and is that "normal?"

No a 1/16 of a turn would only be a few thousandths at most and that section that does not get sized is much bigger then that , but that radius is normal for those dies .

 

[243winxb]

I find it to be normal on my Type S FL bushing die.

I have ask others online, a few have said they can size the whole neck right up to the shoulder. I can not.

Just make sure the bushing can float. You should hear it rattle if you shake the die.

The size stamped on Redding bushings need to face the case mouth when installed. It keeps the bushing from getting crooked when it hits the stop, if facing up.

Autos need the case body full length resized.

For my bolt action, accuracy is better if i only size 1/2 of the neck, while still FL sizing the case body.

 

[stagpanther]

Thanks for the info guys--I did get a full-length--forgot to mention that. I think all is well, I just wanted to make sure. I'm not going to bother with any further cartridge loading until the barrel gets here so I can check the chamber.

 

[stagpanther]

OK guys--I just resized a batch of hornady grendel brass into 6mm predator and have made the following observation--correct me if you think I'm off my rocker.

The slight turning up of the decap rod of 1/16" is mentioned as being necessary to allow for the bushing to center the neck. What I've actually observed is that the extra brass upon necking down has to go someplace--and it seems to me that place is out the end of the neck mouth--this seems to be confirmed by lengthening of the case OAL after making a pass through the 6mm bushing/expander (a drop into a case gauge also confirmed all the growth was in the neck length). A little extra trimming of the neck length is easier than turning the necks--so that seems to be a good thing.

 

[243winxb]

Make sure the loaded rounds neck diameter is at least .002" smaller than the rifles chamber neck area.

 

[stagpanther]

Make sure the loaded rounds neck diameter is at least .002" smaller than the rifles chamber neck area.
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Excellent point--especially since I used a regular grendel die for seating. Thanks for that.

 

[stagpanther]

Got the chamber measurements from ARP and measured my loaded cases--I've got .004 (total, .002 from each side) of slack.

 

[cw308]

The Redding S type bushing dies not very worked for me tried the two step , first neck then finished with F/L size with the expander. I don't neck turn , my runout was poor went back to F/L standard RCBS die, runout was .001neck tension is .002 with Federal brass.