FL sizing question

[savageshooter86]

For those shooters who shoot a factory chamber(usually a 344 or 345 neck), how are you FL sizing cases to keep runout down?

My fired necks are 344 and to get 2 thous of neck tension I need my necks to be 334 after sizing.........

Would it be helpful to get a custom honed FL die close to that neck diameter then use different size expander balls for less neck tension?

I see people all the time online saying they use the Redding S bushing dies but I have found going from 344 to 334 causes runout and also the bushings do not size to the correct size listed on the bushings.

Any input would be greatful

 

[FLIGHT762]

To help runout, it's recommended by many shooters when sizing down from a .344"-.345" neck to size down in increments of no more than .005" at a time. You can use different sized S bushings to do this. Others recommend using Lee's neck only collet die along with a Redding body die to F/L when necessary, which works very well, making accurate ammo. I use both methods.

 

[mdmp5]

I step down size, first with a neck bushing die, and then a f/l die. Runout is very marginal for me with this method

 

[pell1203]

I step size in two increments as well using the following method:

First, brass goes through a Lee collet die to get from .344 down to about .338, followed by a Redding neck bushing die to complete the neck sizing operation (down to .333 - .334 range). So far this seems to be producing consistent ammo.

 

[mtrmn]

Just a thought here, and you're all delving way deeper into this than I have ventured, but you might get hold of CH4D and have a die custom ground to your specs.