6BRA Primers

[Larry Rizzuto]

I use CCI-450's in my 6 x 47 Lapua. My best load is 37 gr. of H-4350 with a Berger 105.

 

[dgeesaman]

I appreciate the suggestions. I think I’ll go back for another charge ladder using the dry neck lube and 1.795 seating depth.

David

 

[lawman29]

Granted they will shoot jammed, and there has been much success jumped 20-25 thou. But what the op has been doing isn't working. Let's look from the start:

The powder test target done 1.801 (10 jammed) at 100 yards. Look at target and observed mid-point of groups to see if any vertical from one to next. Kinda see from 30.0-30.3-30.6 going up...use your imagination. 30.3 picked for seating test. Op is testing .003 differences in unsorted berger hybrids, with most all of them jammed (1.804 13 jammed, 1.801 10 jammed, 1.798 7 jammed, 1.795 4 jammed, 1.792 1 jammed and 1.789 2 off). Look at targets not for group but what is happening vertically between targets.

I would suggest going back to the beginning with a powder test at 200 yards. 1 shot in 0.2 increments, look at targets for vertical or lack thereof (when you shoot more than one you get hung up on what the group looks like rather than discerning vertical differences). Do the test at 5 jammed, touch (1.791) or jumped 20 or all three

After picking a powder, do your seating test, .005 difference between test loads. Start at 5 jammed and work out to your own desires....

 

[X-Caveman]

The rings and scope passed a box test recently on another rifle. I rechecked the clamp screws are tight (Burris Signature Zee) but I have not checked the pic rail screws to the action.

I would still try a different scope - one that shoots small elsewhere. It's probably not the problem, but everything your doing is wasted if it is. It's an easy thing to try.

 

[lawman29]

Granted you are stuck with 200 yards. Fortunately I am able to test at 500 meters here in Cody (great data for 600 yard mid-range comps, but wish I could test at 1k for the long range comps). Just had a new barrel installed on my Dasher and did a ladder test this morning with a new bullet I'm trying. You will see how much easier it is to discern nodes at distance. I will go back and test 0.1 increments between 34.0-34.4 and 34.6-34.8. Hopefully the lower node works because it's wider.

 

[dgeesaman]

I would still try a different scope - one that shoots small elsewhere. It's probably not the problem, but everything your doing is wasted if it is. It's an easy thing to try.

This Sightron came off of a gun shooting .25 moa pretty consistently.

I could try one of my not-so-great-optics Weaver XR benchrest scopes. They've shot very tight before and are collecting dust at the moment.

 

[JFrank]

I appreciate the suggestions. I think I’ll go back for another charge ladder using the dry neck lube and 1.795 seating depth.

David

If I feel as though I’ve lost my way I’ll fall back on an abbreviated ladder.
It always seems to clear things up

 

[Nature Boy]

I havent set any records, but my hybrids like to be in a little too.

Just the tip