Forster Co-Ax/Shoulder Bump

[TimP]

I was following the previous "Forster Co-Ax Reloading Press" post and have a few questions not addressed.
I have been using a old RCBS rockchucker for more years than I care to admit. When bumping shoulders with this press I found I get the most consistent bump using Reddings Competition shell holders. Now with the Co-Ax that would mean using their adapter plate to accept the Redding Competition shell holders. Does that not defeat the advantage of the self centering S-Jaws and the die alignment advantage they produce, For those of you who are using this press to bump shoulders are you using the Redding Competition shell holders and if not what tolerances are you achieving with your shoulder bump.
My bullet seating is done about 50/50 (depending on what I am loading for)between an arbor press and my single stage press. I would like to seat some of my bullets with the Co-Ax and I am assuming it would be best to use the S-Jaws for this purpose. How diffcult is it to switch back and forth between the two different plates.
Thanks, Tim

 

[Alex Wheeler]

I use a coax with the redding comp shellholders. The die has plenty of room to move around and self center. The coax is a great press but it will still flex. I get +/- .0005'' variation in shoulder bump. But I have found it takes a lot more than a good press to get good consistency.
You dont have to switch back to the other shell holders to seat bullets, just use the reddings. It is not hard to switch, but its not some thing I would want to do every time I reload.

 

[TimP]

Thanks zfastmalibu, I agree the press is only part of the equation. I anneal my cases every third firing and found if I leave the case in the die as long as it take to apply imperial wax to the next case I can maintain +/- .0005 variation as well. At least most of the time.

 

[Lazydays]

I was following the previous "Forster Co-Ax Reloading Press" post and have a few questions not addressed.
I have been using a old RCBS rockchucker for more years than I care to admit. When bumping shoulders with this press I found I get the most consistent bump using Reddings Competition shell holders. Now with the Co-Ax that would mean using their adapter plate to accept the Redding Competition shell holders. Does that not defeat the advantage of the self centering S-Jaws and the die alignment advantage they produce, For those of you who are using this press to bump shoulders are you using the Redding Competition shell holders and if not what tolerances are you achieving with your shoulder bump.
My bullet seating is done about 50/50 (depending on what I am loading for)between an arbor press and my single stage press. I would like to seat some of my bullets with the Co-Ax and I am assuming it would be best to use the S-Jaws for this purpose. How diffcult is it to switch back and forth between the two different plates.
Thanks, Tim

Tim,

I had to think about this one a minute. I use mostly Redding bump dies for the shoulder and set each one up for a certain shoulder length and chamber. But I have done it the hard way too. I simple moved the clamp ring up slightly till I got what I wanted. I was going to grind .006" off one side of the lock rings (I use Lymans instead of Forster), and cut a shim, but never took the time to try it. The bump die just worked so well for me.
gary