Is sizing a case .008 gonna cause issues with bushing dies?

[Send it 284]

I'm wanting to use a fl bushing die to size a 30 nosler case down .008, this includes .002 neck tension.
Am I going to have runout issues?
I really don't want to use standard dies cuz my
chamber neck diameter is .346 and redding/ rcbs dies will take it clear down to. 334

 

[ShtrRdy]

You could run into introduced runout. You will also end up with more than the bushing diameter when trying to reduce the neck diameter that much in one step. It would be better to do the neck sizing in two steps. No more than 0.004" at a time.

 

[Send it 284]

You could run into introduced runout. You will also end up with more than the bushing diameter when trying to reduce the neck diameter that much in one step. It would be better to do the neck sizing in two steps. No more than 0.004" at a time.

Interesting
So there wouldn't be any runout issues taking it down .008 as long as it's done in two steps?
I guess that makes sense.
The other method I've been considering is to order a custom set of Lee Collet neck dies, but I'd have to also get a body die to bump the shoulder back after sizing the necks..
I want to get it right the first time or all these dies will start adding up

 

[ShtrRdy]

Interesting
So there wouldn't be any runout issues taking it down .008 as long as it's done in two steps?
I guess that makes sense.
The other method I've been considering is to order a custom set of Lee Collet neck dies, but I'd have to also get a body die to bump the shoulder back after sizing the necks..
I want to get it right the first time or all these dies will start adding up

It's possible you could reduce the diameter by a bushing that's 0.008" smaller and not have much runout. But the actual neck diameter you end up with will be more than 0.008" less.

 

[ThrdKllr]

I use a bushing F/L die without the bushing and use the Lee Collet neck die to size the necks and get very good numbers for run out and good SD's and ES's. Best way I've found.

 

[243winxb]

https://www.redding-reloading.com/tech-line-a-tips-faqs/142-concentricity-a-bushing-dies

Redding info.
I dont measure runout. My target at 300 yds seems to think my ammo is ok? I size in 1 step with bushing.

Just bought a Lee collet neck sizing die to use with the Redding S Fl die (body die). Needs testing in the spring.

 

[Tiny Tim]

Cant say about induced runout, but too large a step with bushing dies will size the neck smaller than intended, perhaps as much as .003-.004. This means the I tended .008 may end up closet to .011-.012. Go in two steps. It was an eye opener for me with my first experience with bushing dies.

 

[nksmfamjp]

When I was using them, I was sizing about that much.....no issues. I had runout issues, but fixed those locking the bushing down tight.

I'm sure it overworks the necks, but annealing will fix that.

I would do some testing 1 vs 2 steps before you decide to spend time with 2 steps.

I would also imperial sizing wax which is thinner and may not induce the runout issues I had to fix through lock down.

 

[Send it 284]

Thanks for the good info guys
I'm going to get a body die, then order the custom lee collet neck dies after I fire a few cases.