Thread: Precision projectile seating

Seeing and hearing a lot regarding the projectile seating phase being done with a seperate press (Arbor) and a chamber type seater like a few well kmow manufactuers make.
You can even measure seating force mechanically or hydraulically.

It is supposed to deliver a more accurate and consistent product if you observe the process correctly.
As I load 99.9% of my rifle ammo for hunting and am pretty happy with the end result I cant help but be curious about new techniques that can improve my ammo. Is it even worth it?
Im a bit of a Weka and definitely like shiny new things I dont need so will probably give it a go.

Does anyone on here have any real world experience using this method. I would imagine it would benifit a lot of target shooters.

I like the look of the 21st century hydraulic press and LE Wilson dies.

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Realistically what sort of grouping and es are you getting with your current methods ?
Even with my budget lee press, redding comp seating die my loads shoot well under .5 moa and I think from memory the ES was something like 20fps.
I don't think that leaves a lot of room for improvement for me.
What are you trying to achieve by going down this route ?

Originally Posted by dannyb

Realistically what sort of grouping and es are you getting with your current methods ?
Even with my budget lee press, redding comp seating die my loads shoot well under .5 moa and I think from memory the ES was something like 20fps.
I don't think that leaves a lot of room for improvement for me.
What are you trying to achieve by going down this route ?

I agree with everything youre saying and implying.
And I will admit I doubt I can improve that much on what I do now especially for a hunting load.
Just curious more than anything.




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Don't worry mate I find lots of ways to justify things I just wanna try

It depends on how much you Kea about accuracy.

All jokes aside, Julian the previous owner of Workshop Innovation was a strong advocate of Arbor Presses and Wilson Straight Line Dies.

Although I understand the principal I haven't been able to work out what process you would have to change if your force meter showed inconsistent results.

If you do jump into this rabbit hole please keep us posted on your findings.

Originally Posted by Tech

It depends on how much you Kea about accuracy.

All jokes aside, Julian the previous owner of Workshop Innovation was a strong advocate of Arbor Presses and Wilson Straight Line Dies.

Although I understand the principal I haven't been able to work out what process you would have to change if your force meter showed inconsistent results.

If you do jump into this rabbit hole please keep us posted on your findings.

If I was serious about presses I doubt you could improve on the German Präzipress.

The gauge imo, will tell you considering your brass prep was in order that you would only have to change out the piece of offending brass or remedy it if possible.

I just checked runout and seating on all my loaded 260 improved ammo. It certainly wasnt as good as I remember it was when i did a control check when loading it, however still well within spec.
I dont have compressed loads either.


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Originally Posted by R93

If I was serious about presses I doubt you could improve on the German Präzipress.

The gauge imo, will tell you considering your brass prep was in order that you would only have to change out the piece of offending brass or remedy it if possible.

I just checked runout and seating on all my loaded 260 improved ammo. It certainly wasnt as good as I remember it was when i did a control check when loading it, however still well within spec.
I dont have compressed loads either.


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Tech Tip: Try Rotating Cartridge During Bullet Seating Process — This Might Reduce Bullet Run-Out « Daily Bulletin

Originally Posted by TeRei

Tech Tip: Try Rotating Cartridge During Bullet Seating Process — This Might Reduce Bullet Run-Out « Daily Bulletin

I've always done this on a hunch.
Nice to see someone has taken the time to verify tangible gains in doing so.

Originally Posted by Moutere

I've always done this on a hunch.
Nice to see someone has taken the time to verify tangible gains in doing so.

Have always done it too, sometimes in 1/3rds. Doesn't seem to make a difference though in some die, cartridge set-ups but it can't hurt.

The force is relative to how hard your neck is and how uniform it is. My 2C. The easiest method? Annealing. Your groups just close up.We lube our necks when sizing and then wet clean them before seating.Running 53gr Barnes in our 8 twist. Recent run of deer with holes in their eyes and ears.

Originally Posted by TeRei

The force is relative to how hard your neck is and how uniform it is. My 2C. The easiest method? Annealing. Your groups just close up.We lube our necks when sizing and then wet clean them before seating.Running 53gr Barnes in our 8 twist. Recent run of deer with holes in their eyes and ears.

This. If you stop seating according to the seating *pressure*, then you must be making seating *depth* variable.

I've never heard of @mickey Duck's trick of rotating the case with half seated bullet 180 degrees and then completing the bullet seating...makes perfect sense for concentric seating.

Might also stay up all night tonight, pull and double re-seat all my .22LRs so I'm sure they're all done right... (-:

@R93 I think you should buy all the kit and give it a go.
Then report back your findings.


Get a 6.5x55 swede die while your at it....

I was shown a method YEARS ago that does a pretty darn good job of concentricity.......had folk scoff then try it and eat humble pie....
even using lee press and dies it does a VERY good job....start seating projectile,then turn it and case half way around and finish it off,takes but a second to do and as said it works.

Originally Posted by Micky Duck

I was shown a method YEARS ago that does a pretty darn good job of concentricity.......had folk scoff then try it and eat humble pie....
even using lee press and dies it does a VERY good job....start seating projectile,then turn it and case half way around and finish it off,takes but a second to do and as said it works.

Yup I do this works surprisingly well

WTF! About time to buy a new PC.

Administrator, please delete posts #12 and #13.