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Question Regarding Redding Bullet Seating w/o Crimp

 
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  #1  
Old 03-21-2007, 12:41 PM
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Question Regarding Redding Bullet Seating w/o Crimp

I've only ever reloaded 308 and 300WM; for both calibres I have only ever used Redding die sets. This 'problem' has bugged me for years. Grateful for any views / answers:

When it comes to bullet seating, I have always followed the requirement stated in the instructions regarding the need to back the seating die away from metal to metal contact with the shellholder in order not to crimp the case.

However, it has always struck me that hard shellholder-to-die contact would be a far more consistent means of stopping the press's upward movement of the shellholder.

...without shellholder-to-die contact the upward shellholder movement is only stopped by the press reaching its mechanical limit of movement. Obviously there is minute slack in all presses, and so vigorous hard press strokes produce bullets seated to a different depth to slow soft press strokes.

...and thus 'consistency' of press stroke is vital to consistent bullet seating depth.

...which requires concentration, slows things down (and is boring!).

(but obviously there's no problem if you seat with crimp!)

FINALLY (!) MY QUESTIONS:

Does, as I suspect, hard shellholder-to-die contact enable consistent bullet seating despite inconsistent press stroke speed/vigour?

Can the 'crimp' bit be easily polished out of the seating die to enable shellholder to die contact without crimping?

Is this a problem with all brands of seating die?


Thanks if you read this far!

Matt
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Old 03-23-2007, 01:12 AM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

btt.

Not the most exciting question I guess! ...but still interested if anyone has a view.

Thanks

Matt
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Old 03-23-2007, 12:17 PM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

Not all presses are created equal. Yes, most "regular" dies crimp at the top of the stroke unless you back die off shellholder. Most quality presses are fairly consistent with dies backed off, but why use a regular die? If you are serious about LR relaoding, go to the Redding benchrest dies (or Forester if you want cheaper) and eliminate the crimp function within the die. Better quality seating dies that can be bought separately. Good luck. [img]/ubbthreads/images/graemlins/cool.gif[/img]
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Old 03-23-2007, 01:28 PM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

wapiti13,

Many thanks for your reply!

On the redding and forster benchrest dies, does the shellholder contact the base of the die ?

(I get all the accuracy I'm capable of from my standard dies, in 308 I have one standard load that never changes (it'll give me < 0.3MOA in a 100 metre pipe range) but I'm bored of concentrating on consistent press stroke! ....I'm wondering if I could simply get the crimp ring polished out of my standard die?)
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Old 03-23-2007, 02:24 PM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

Cant tell you about polishing your current dies; but the Redding and Forster Comp. seating dies have a piece imitating the chamber that slides inside the die as the case contacts it.-so it´s not the die that contacts the shellholder but this piece.Hope this helps.
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Old 03-24-2007, 05:42 AM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

[ QUOTE ]
the Redding and Forster Comp. seating dies have a piece imitating the chamber that slides inside the die as the case contacts it.-so it´s not the die that contacts the shellholder but this piece.Hope this helps.

[/ QUOTE ]

Thanks älg,

Does the sliding piece contact the shellholder hard enough that it stops the upward movement of the shellholder

.....or are you still reliant on the press reaching its mechanical limit of movement?
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Old 03-24-2007, 02:48 PM
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Re: Question Regarding Redding Bullet Seating w/o Crimp

No it is not hard enough.-it relies on a spring that is on top of the die, and the idea ( as far as I know-I just started using these dies)is that the case is driven inside the sliding piece in order to be centered when the bullet is sat- .

However you got me thinking and after writing the paragraph on top I´ve run to the press and set the redding die.- If the die is screwed down enough, you can sit the bullets without needing the press ram to reach it´s limit in the press ( I mean you do not need to pull the handle to the maximum)...The sliding piece stops when the shellholder touches the die.

But you still need the shellholder to touch the die; you are just avoiding the so called "cam" movement of the press when the handle is at full stroke.

Maybe you could change the spring but you would get very inconsistent results when sitting bullets unless you were able to apply exactly the same force evry time.
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