Precision reloading taming StD and ES

[Dubious]

can anyone share a few tips on taming the ES and Std of there reloads. I've got a great repeatable 5 rnd load( please see link https://imgur.com/scw25W9 ) but my ES and StD have been dogging me. I'm trying to get a StD of max 10 and an ES of less than 20 and haven't been able to shrink it I've tried weighing bullets trimming brass measuring bearing surface seating out to the lands. What would your next step be I was thinking of trying different primers i'm currently using fed Large rifle match with Nosler brass, Berger 115 Vldh and a stout dose of VV N560.

[Dick284]

Take a level 2 reloading course. Ask at Custom Gunworx,

[duceman]

load #1 on your target looks like one to chase. shoot at distance; minimum 500 m, and see where your groups and vertical are. there’s a good chance your chasing a goal that may not yield much in the way of value.
if your vertical is 1” or less at distance; practice more; and learn to read wind.

[Dubious]

dick with the covid that may not be possible for quite some time.

neck turning in on the radar I already anneal with a home machine I made, primers seem like an easy thing to try. I've experimented tonight with non trimmed brass with bullets weighing 114.9-115.1 gr trimmed brass with bullets weighing 114.0-115.1 and trimmed brass with bullets only weighing 115 and having the ogive to base of bullets measured so there all the same, these groups produced StD's of 7.4 21.4 and 10.4 respectively and where the groups posted in the target.

just hoping there isn't something easy i'm overlooking and I want to make sure I spend my money in the right places.

[marky_mark]

Primers are cheap and easy
Iirc the Gunwerks guys considered 30 fps es to be the standard
Above it, load needs work
Below it is acceptable

https://precisionrifleblog.com/2015/...erall-summary/

[obsessed1]

How does it shoot past 500 yds? Have you tested it out at distance or are you getting hung up on the #s. Dont get me wrong I often fall down that hole myself, sometimes we chase things we don't have to chase. What chrony are you using?

[Dubious]

I use Labradar to crono my loads.

I have not tested this past 100m as this load is newly developed. that'll come this weekend when I can make a trip to milo the local range is only 100 yards milo has 50-500M

[fps plus]

I went down that road . Answer is extremely simple anneal your brass

[Dubious]

Originally Posted by fps plus

I went down that road . Answer is extremely simple anneal your brass

Do you use templac what temp for how long. I made my one home annealer a while ago but stopped cause I felt I was over annealing and causing more harm than good.

[Dubious]

Annealing has helped I have been able to reduce the STD to 6.9 more experimentation is need to see if this permanently reduces std but I hope it will.

[Cheyenne 1]

Consistent annealing is important
Every step you do has to be the same each time.
Brass selection and prep. Primers can make a big difference as well.
What do you weigh your powder with ?
What kind of dies are you using? Do you full length size? How far do you bump your shoulder back ?

I may have missed the caliber ? How full are your cases?
The groups look good. If your only going to shoot 100 yards then they are all good.
If you wanna shoot long. Then try them long and see what the groups look like
What you wanna see is minimal to no vertical. The vertical is all in the load and shooter. You want the load to be in the node where the bullet is stable.
That’s the most important part. I shoot F-class and I know our guns are heavy
And all the rest everyone will say.
But we have to be consistent in what we do to be competitive.

Likely be easier if you wanna PM me.
Or text or call.
Be more than happy to share with you.
Thanks

[Dean2]

Things that affect SD and ES in the order of importance;

Right powder at exactly the same weight and one that comes very close to 100% fill at the seating depth for the bullet you want to use. You also need the optimum burn rate for the combination to get the lowest SD. The lack of temp stability with the powder you are using is going to make getting ES down where you want it pretty tough.

Consistent Jump, light touch on the lands will often drop ES.

Consistent neck tension not above .003

Neck turn brass if not using Lapua

Experiment with primers. In large cases with heavy loads hotter mag primers as in Winchester or Federal over CCI will often reduce SD.

Weight sort cases and uniform the flash holes.

If you still have SD and ES above what you want after trying these get a different brand of brass. The internal volume of the brass is what really matters and weight sorting is only a very rough approximation of internal capacity.

Best of luck, let us know how you make out.

(STD is actually a Sexually Transmitted Disease, and while a fellow wants to minimize that I am pretty sure that isn't what you meant to say here.)

[Dubious]

Originally Posted by Dean2

(STD is actually a Sexually Transmitted Disease, and while a fellow wants to minimize that I am pretty sure that isn't what you meant to say here.)

Lol ya I know it’s abbreviated as StD on my labradar so that’s what I was going for. For all you old fellas that are afraid to comment they call that STI for Sexually Transmitted Infections these days. Now we’re all learning stuff.