How do I get low ES/SD (long post w/ pics) update 1/8

[JRinCo]

Boy, where to begin. When I develop loads, I save all of my targets, so that I can use them for comparative analysis whenever the need arises. I write all of the load information on the target, seating depth, primer, charge weight, temp., wind conditions everything.

I only develop loads at 100 yds., by doing so I eliminate having to worry about whether the shots on target are weather reports or problems with the rifle or the load. Shooting a 6.5, unless conditions are severe, a wind shift won't be very noticeable on target at 100 yds. but it sure will at 200 yds.

Continue load development with one powder (your H4350) until you are confident that you have tried everything with it. And if you're not satisfied, then try something else. I would shoot a 5 shot group at 100 yds. over the chronograph, let the barrel cool and then try the next series. You might want to clean your barrel when you move to your next powder. If your chronograph is working, it will give you a pretty strong indication whether or not you have reached your upper limit.

To properly set your sizer die, first knock out the primers on a couple of cases and measure them with your Hornaday comparator. You want adjust your die so that you only set the shoulder back .0015 or .002

After you have sized all of your brass, find the shortest piece and trim them all to that length.

Keep us posted.

 

[Erik Cortina]

Re: How do I get low ES/SD (long post w/ pics)

Lynn,

Do you shoot one shot of every charge? Almost like a ladder test, but instead of looking for tight groups you look for small variations on ES?

Thank you.

-Erik

...To get your lowest extreme spread go up incrementally in your powder charge 0.4 grains at a time and watch your chronographs numbers.Don't worry about putting your shots into a nice group at this point just chronograph the load using even increments of time between each shot.I wouldn't even hang up a target.
Your chronograph numbers will resemble and hour glass shape with big variations at the bottom and top and a thin section were the extreme spread gets real small.When you find that point you can now hang up a target and play with the seating depth to get best accuracy.
If your extreme spread never gets into that nice low numbers your after the primers or powder your using isn't right.I would start with the primers.
Lynn

 

[JabaliHunter]

Re: How do I get low ES/SD (long post w/ pics)

I have been contemplating getting those after ruining a custom die plus 100 lapua cases. On the Siclairintl site there are 3 products that seem to be the same thing, or that i dont know the difference and which one to get or just all?

Imperial Die Wax? - for the outside of the case (avoid the shoulder); AND
Imperial Dry Neck Lube? - graphite for the case necks (inside and out); OR
Imperial application media? - an easy way of applying the dry neck lube