How critical is runout at 100 yds

[urbanrifleman]

Sell that concentricy gauge and use the money to buy better brass. Like Lapua.

Then never think about it again.

 

[jcm800]

Have a couple old Bonanza BR seater with the sliding sleeve that will equal / beat my Wilson inlines.
As others have said it's a tool for setting up dies.....pretty cool when you can get .0005 or less.

 

[urbanrifleman]

You cannot make crooked brass straight with a sizer or seater.

 

[6Creed73]

You cannot make crooked brass straight with a sizer or seater.

Brass is malleable and is formed to the sizing die. Can you explain why running a piece of crooked brass through a straight die won't make the brass straight?

 

[urbanrifleman]

Brass is malleable and is formed to the sizing die. Can you explain why running a piece of crooked brass through a straight die won't make the brass straight?

It doesn't. Because internal stresses make it crooked.

Crooked brass has stress in it from the factory. That can make it shaped like a banana and a sizing die doesn't MOVE material laterally. To reshape metal you have to MOVE IT into plastic deformation. And to fix lateral runout you would have to bend it PAST center to let be reformed.

I tested a that stuff 25 years ago. When the brass was all crooked.

Buy better brass.

 

[NorCalMikie]

Never bothered to check. All going in the same hole @ 100 yards.
Once a bent round get stuffed into the chamber, it WILL get straightened out enough to shoot bug holes.
Competition shooting? Different story.
M1A is good at bending rounds. Single feed, fire and slap in another 20 round mag.

 

[urbanrifleman]

Never bothered to check. All going in the same hole @ 100 yards.
Once a bent round get stuffed into the chamber, it WILL get straightened out enough to shoot bug holes.
Competition shooting? Different story.
M1A is good at bending rounds. Single feed, fire and slap in another 20 round mag.

I'll buy that. A chamber fireforming might do it. But not a die.

 

[Zero333]

I get Half the run-out by just using O-rings in the proper places and let the dies float a little....

 

[Mark611]

That's the same principle I use but I use the O-ring on the shell holder, I do not use sizing dies that touch the neck when sizing the case body, and neck sizing is done separately with a LCD, and I get 1k or less runout no matter what manufacture of brass I use, the free floated shell holder helps algin the case so it centers itself to the die,

 

[Zero333]

That's the same principle I use but I use the O-ring on the shell holder, I do not use sizing dies that touch the neck when sizing the case body, and neck sizing is done separately with a LCD, and I get 1k or less runout no matter what manufacture of brass I use, the free floated shell holder helps algin the case so it centers itself to the die,

I have a Rockucker single stage press and a XL-650... How can I put an O-ring to float the shell holder on my RC press ???

 

[Murray Brook]

I believe he means to get rid of the shell holder retainer clip and replace with a rubber o- ring. This is suppose to allow the shell holder to float and find it's own center.

 

[6MMsteve]

quit chkn outrun yrs ago, after I started using Wilson bullet seat dies, captured then surrendered.

 

[dgeesaman]

I only shoot at 100yds. I have a Rem 700 action and a Hart barrel with a Jewell trigger in 22-250. I have 34 targets over the last 3 years under 1/4". At this range what would be the acceptable runout. I am getting about .004 runout. Is this amount of runout OK? I average 5 shot groups most of the time under 1/2". Lapua brass annealed after each time I use them. Ammerman bullets in a 1-14 barrel vv150 powder

I’ve managed to make all of my centerfire varmint rifles into some version of a one-ragged-hole-at-100-yards shooter and never measured runout even once.

David

 

[Mark611]

Murry that is correct! you need to remove the clip, and use an O-ring that fits snuggly over the ram, you can roll the O-ring up and down to replace the shell holder, then roll the O-ring back into the groove where the clip was, it will hold the O-ring in place!

 

[Dave M.]

I only shoot at 100yds. I have a Rem 700 action and a Hart barrel with a Jewell trigger in 22-250. I have 34 targets over the last 3 years under 1/4". At this range what would be the acceptable runout. I am getting about .004 runout. Is this amount of runout OK? I average 5 shot groups most of the time under 1/2". Lapua brass annealed after each time I use them. Ammerman bullets in a 1-14 barrel vv150 powder

Runout is virtually meaningless and has no correlation to accuracy through all of the testing I’ve done.