Redding Type S FL Bushing Die Adds Run Out to 338

[Blackbrush]

I have a fair amount of experience over 25 years loading stuff from 22 Hornet to 505 Gibbs so I'm not totally new at this but fired brass comes out of my 338LM chamber with less than .001" run out. FL sized it comes out of my die close to .003" run out at the neck. I'm setting the shoulder back .001". Suggestions please.........

Forester Coax
Lapua once fired brass
spray lube
Ti bushing left just loose enough to float - no expander used

Thanks

 

[arnie19]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

You probably know more than i do but do you have to set the shoulder back? If not ,try running the die up a 1/4 turn or so and see if just sizing the neck and body keeps the run out to .001 .Arnie

 

[Bayou]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

Get rid of the expander in your FL die and then size and measure run out. If it shows improvement then ditch that expander for good. Pick up a Lyman M expander for when you need one. I don't always use an expander. Since the necks expand on shooting I usually just squeeze them back down during sizing and don't bother with the expander. When I see out of round mouths then I use the expander. I traced high run out to the expander in Redding Type S bushing neck sizing dies in 308. Ditching the expander solved the problem.

EDIT: Opps, never mind. Just re-read the OP and saw that no expander was used.

 

[wnroscoe]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

#1. Measure a fired case neck OD, un-sized
#2. FL size your brass and measure a sized case neck OD

If your sizing your neck down more than .005" thats the cause.

If the neck is being sized down more than .005" change bushings and size it to your desired diameter with two operations/bushing changes.

 

[Blackbrush]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

You're on the money Roscoe. Fired is .3715 and the .363 bushing Bruno's suggested when they sold me the brass leaves me at .3615 after sizing. As my neck wall thickness is .015 on the money, it does sound like things are a bit tight in resizing and a bit tight in seating too perhaps. May try a .366. Thoughts?

Thanks!

 

[texasleftychef]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

I measured all of my Redding TI bushings the other day and it appears to me that they are .001 to .0015 smaller than the stamped number. That might account for .363 bushing leaving you with .3615

 

[gau17]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

They are probably made that way to account for spring back. I could be wrong.

 

[knockemdown]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

When you dropped in the bushing, was it 'stamp down'?
Also, did you hard tighten the decapping stem down on the bushing? IIRC, one is supposed to make contact with the bushing, then back the stem out 1/16th turn and set the lock ring so that the bushing 'floats' inside the die.

Maybe pointing out the obvious, but those two are recommended by Redding & weren't mentioned...

 

[wnroscoe]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gabbott</div><div class="ubbcode-body">You're on the money Roscoe. Fired is .3715 and the .363 bushing Bruno's suggested when they sold me the brass leaves me at .3615 after sizing. As my neck wall thickness is .015 on the money, it does sound like things are a bit tight in resizing and a bit tight in seating too perhaps. May try a .366. Thoughts?

Thanks! </div></div>

Your chamber neck is .372"ish, now, seat a bullet and measure the neck OD. Subtract .003" max or .002" minimum from that measurement, thats the bushing you need. With your brass being .015" thick per side, your loaded neck will most lilky measure .368". I'm guessing you'll need a .365" / .366" bushing.

Now, on the topic of bushings, Wilson is the only way to fly. Number up when you insert the bushing in the die. Number down will size the neck down another +.0005" from the stamped size on the bushing.

Redding is always smaller than stamped and will always size the neck smaller than you need.

If your chamber neck is in fact .372" and your loaded neck is .368" your moving your brass .006" to .007" depending on your bushing choice from fired to sized. From experience, I can tell you to expect .0015" to .004" runout in your sized necks when you move the brass .006" or more.

In order to eliminate as much RO as possible change your bushings to .365"/.366" and .368". Use the .368" bushing first and FL all your brass. Change to the .365" or .366" bushing and re-run your brass through the FL die to finish things up and you'll be in the money.

I once had a 300 Jarrett with the same issue. The neck RO drove me crazy until I measured things and saw what was up. What I suggested to you is what I did and problem solved.

This is the reason all of my chamber reamers are no more than +.005" over a loaded round, .003" to .004" over is where I try to be if at all possible.

The little things do make a huge difference at distance.

 

[texasleftychef]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

that's very helpful information right there that might have solved one of my problems as well.

Thanks wnroscoe

 

[X-fan]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

Pull the expander ball and try sizing a case then remeasure.
Seen it before a dozen times.

I have money that says the ball/rod is messing things up.

 

[Blackbrush]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

Thanks for all the help guys.

Note I am using the Ti (Redding) bushing left loose to float a bit in the die without the expander.

I am sure Roscoe has hit it in that I'm sizing it too small/much. I'll get a new bushing and get back with a report.

I have to shoot up some bent ammo first!

 

[shoepop]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

.003" is not bad you won't even notice it on the range even long range. I do however understand you wanting to get it the best you can the above will get you there, good info.

 

[wnroscoe]

Re: Redding Type S FL Bushing Die Adds Run Out to 338

I dont even check for RO anymore. Understanding how to size correctly and what happens when one doesnt will solve problems before they come up.

OP, Measure RO on a fired, un-sized case. Now, remove the bushing from the die completly and FL size a case. Measure RO again.

You should be at or very close to "0" or tghe same.

Replace the bushing and size one more time, re-measure RO.