Tips for reducing extreme spread

[tachyon]

So, I’m shooting F/TR at 1000-1200 where ES and SD really matter.

What are your reasonable expectations?

What are you tips for delivering less is more?

Today I was here:

DA963668-8DC5-4105-A77C-1DDE8F5CD5C4.png

[Brad Y]

And we’re you getting vertical with that ES?

[GregW]

Generally speaking, if you can maintain an ES of 20 fps consistantly you are doing ok. The secret in long range accuracy is in the tune of the rifle. No rifle will shoot at both ends of the range, so if it works at 300, it will not at 1,000. My suggestion is, get a barrel tuner fitted and play with it at "the longs". 8/900 is a good place to do it. You can "fiddle" with loads and seating depth, but this is a more complicated method, and in my experience does not last as long. Good luck!
Greg Warrian.

[Tim L]

No rifle will shoot at both ends of the range, so if it works at 300, it will not at 1,000. .

Hi Greg,
Could you maybe expand on that. I don't know what I'm doing wrong but all mine seem to work at whatever range I set them for.

For the OP, for minimal ES do everything you can to produce consistent rounds. Be as close to 100% capacity (I'd rather be at 102 than 98) as you can. Don't underestimate the importance of set up on the mound.

[Redhawk]

Tachyon, if I read your photo correctly that is an ES of 16fps? If so, and you get good groups at 300-500yds you should be fine at the longs. All my rifles that shoot well at 1,000, shoot well at 300. They are in tune from 1,000-300 with a specific projectile, that is stable and fly well.
Not necessarily the case the other way around:
Sometimes, a projectile will give some vertical at 1,000 where it seems ok at the shorts….. might not be your load or tune, but rather variable bc across the batch (ogive/bearing surface length or meplat form) Thus the rifle and projectile are in tune, but there could be a dimensional difference across the projectiles that cause the vertical deviation to be pronounced at the longs.

Give me a pm, if you want to talk it through.

Regards
Frans

[PeteFox]

James
this video might answer some of your questions - reverse engineering required elevation dispersal into ES

https://youtu.be/Qelz4VBq_Dk

Pete

[tachyon]

James
this video might answer some of your questions - reverse engineering required elevation dispersal into ES

https://youtu.be/Qelz4VBq_Dk

Pete

Thanks Pete, very helpful.

[PeteFox]

The aim of reducing extreme spread is to reduce vertical at long range. However James you seem to have got your ES very low. what if your vertical is coming from somewhere else?
Have you considered that it might be BC variation between bullets.

An interesting read for you
https://www.accurateshooter.com/gear-re ... nting-die/

With all of this stuff it's a matter of how deep down the rabbit hole you want to go.
Pete