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case trim pilot correct size but inside case dimensions too small.

 
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  #8  
Old 05-23-2010, 05:25 AM
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Re: case trim pilot correct size but inside case dimensions too small.

It sounds like the sizing ball in your die is too small. The neck sizing ball should be about .0015" smaller than bullet diameter. I have put a trimmer pilot into a drill and used some emery cloth to slightly reduce the diameter of the pilot to make it fit into the case necks easier but this is usually not necessary. BTW, getting the pilot into the cases for trimming is the least of your problems, as the reduction in sizing then the expansion of firing is working the he!! out of your brass. Maybe the new dies you are getting will solve the problem. Redding has great customer service and will correct any real problem with their dies. I know this from personal experience with them, and they are first rate. I have also heard of guys turning the stem from the sizer die in a drill while holding emery cloth in their fingers to polish and reduce the ball size, but yours seem to be way too far out of spec. Good luck and hope you can fix this problem.
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Old 05-23-2010, 05:52 AM
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Re: case trim pilot correct size but inside case dimensions too small.

Quote:
Originally Posted by partisan1911 View Post
I assume I can take the one off the NK and use it in the FL die? Does this mean when I bought the set it came with the wrong expander ball in the FL die? I bought the set new.

I would not switch parts around.
Yes it is the wrong expander ball.
I would send/take the dies back to where I purchased them and get a new set.
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  #10  
Old 05-23-2010, 07:16 AM
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Re: case trim pilot correct size but inside case dimensions too small.

"I assume I can take the one off the NK and use it in the FL die?"

Sure, why not? That will clearly solve your immediate problem until you can get it corrected.



"Does this mean when I bought the set it came with the wrong expander ball in the FL die?"

Unless you or someone else swapped it around, it appears so.



"I bought the set new."

Okay. Now take it back.
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  #11  
Old 05-23-2010, 07:16 AM
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Re: case trim pilot correct size but inside case dimensions too small.

This is but another example of reloading issues discussed here that once again, resolve to use of FL dies -as a shortcut.
Two problems here that NS/body die users don't get into because:
1. We don't use/need expanders
2. We think about what it is that we're actually doing to our brass, while we specifically adjust for it. We choose our bushings, and measure our shoulders.. And everything works to a plan..
None of this slap hazardly running brass through a single die, and assuming it magically does it all correctly, unless results are so far out of whack that questions 'must' be asked about it..

But anyway, off my soapbox..
Even when you fix the sizing issues, that 338 trimming pilot will NOT work for sized brass, right?
So fixing a die won't help you there.
You'll need to trim pre-sizing or turn down the .338 pilot to about .334 for post-sizing use.
But, if you trim pre-sizing -while following with FL sizing, then case length will end up inconsistant. This is because FL sizing lengthens cases based on the amount of it's over-sizing.

So the solution to your original problem is use a correct size trimming pilot, post-sizing.
Turn it down, or use another that's right.
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  #12  
Old 05-23-2010, 12:49 PM
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Re: case trim pilot correct size but inside case dimensions too small.

1. We don't use/need expanders
2. We think about what it is that we're actually doing to our brass, while we specifically adjust for it. We choose our bushings, and measure our shoulders.. And everything works to a plan..None of this slap hazardly running brass through a single die, and assuming it magically does it all correctly, "


Mike, you were doing good but now, with magic neck "bushings", you've done gone too far!

All a bushing can do is make the necks consistant, or nearly so, on the outside so the insides vary due to normal neck inconsistances. On the other hand, all an expander can do is make the necks consistant, or nearly so, on the inside. If that inner consistancy matters to anyone. It does to me.

Mostly meaning that neither neck sizing system is perfect if it stands alone. ;)

Last edited by boomtube; 05-23-2010 at 01:39 PM.
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  #13  
Old 05-23-2010, 01:17 PM
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Re: case trim pilot correct size but inside case dimensions too small.

So I plan on using a different expander ball and polish down the trim pilot.

I guess it was just bad luck on the size of the expander ball and bad marketing on the trim pilot.

Both of the trim pilots were the same size of .338. I would have thought the manufacturer made them for the .338 caliber but corrected the size to fit inside the neck.

If using FL dies is a shortcut, what other dies am I supposed to use if not getting custom dies cut?

I figure if I run the brass through the die with the right expander ball, trim to size, trim the outside of the neck, I would be tracking with some good brass. Maybe not benchrest but it should work for some decent long range hunting brass?
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  #14  
Old 05-23-2010, 01:46 PM
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Re: case trim pilot correct size but inside case dimensions too small.

"So I plan on using a different expander ball and polish down the trim pilot. "

Well, think of it a little differently: you will use the CORRECT size expander and see how the current pilots work. And lube the pilots/necks with case lube to reduce friction.
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