6.5CM Berger 144 LRHT: Help me find the right seating depth

[Mahziar]

I am with @Bill Norris on this- 2.118. 4-shot formation is a already something, 2nd place -2.100.

Are you shooting off bipod or a front rest like SEB neo or similar?

I have the Rodzila but never used it
I was shooting off of Accutac FC-4 and adjustable rear bag rider
You know my only confusion is that node is only 3thou, I thought have to find a node that has at least 2 consecutive small groups

 

[marchx]

I was looking once for a decent node, I had my labradar data and an excel table like you and it cost me about 200 rounds (I was testing in 3 different weather conditions- early in the morning, noon, and late afternoon) and I still was not sure if I found the right node. so...

 

[Mahziar]

I was looking once for a decent node, I had my labradar data and an excel table like you and it cost me about 200 rounds (I was testing in 3 different weather conditions- early in the morning, noon, and late afternoon) and I still was not sure if I found the right node. so...

At what distance were you testing?
Did you test different neck tension?

 

[JFrank]

Update
I drove 2 hours to get to the range today but they didn’t allow me to set a target no more than 400 yards
Anyway I attached the target below
There was some nasty winds from 6 and 9 o’clock, 3-6mph
I wish I had an electronic target lol.
It wasn’t my best shooting cause I always shot at steel and its my first time shooting at the paper this far, but to be honest the results are very confusing and I dont know what to pick.

View attachment 1514498

Have you tested neck tension yet ? How about a primer test ? If not that would be my next move.

If your neck tension is off for the load the groups
will certainly be erratic and difficult to assess.

Primer influence is a bit more subtle.

 

[Gb300wm]

Ok if I choose the 2.100
How can ai bring the group together? Neck tension?

I would bring the two loads out again on a calm morning and retest. Those groups are not bad and wind played a big part in them.

 

[J_idaho]

Why didn’t you test 2.058 & 2.055

 

[Mahziar]

Why didn’t you test 2.058 & 2.055
View attachment 1514683

The reason I didn’t do that was the wide accuracy node from 2.121 to 2.097 everything was in the .2s and .1s in that range @ 100yards

 

[JFrank]

@ 100 yards everything looks good.

 

[Mahziar]

@ 100 yards everything looks good.

Exactly
W don’t have the luxury of anything more than 100 yards in bay area lol

 

[JFrank]

Exactly
W don’t have the luxury of anything more than 100 yards in bay area lol

You may have to go do load work at a longer range, set up a couple powder, bushing and primer ladders, take some extra pre weighed charges in vials along with you seating dies. Etc. get er done that way.

 

[Mahziar]

You may have to go do load work at a longer range, set up a couple powder, bushing and primer ladders, take some extra pre weighed charges in vials along with you seating dies. Etc. get er done that way.

That’s a good Idea too

 

[Kracken McGraw]

Looks like groups are tightening up to me the closer your getting to the lands.

 

[Mahziar]

Looks like groups are tightening up to me the closer your getting to the lands.

I think so, it was the se results at 100 yards as well. I think Berger hybrids perform the best anywhere from 20-50 thou off the lands which in this case is 27thou

 

[Kracken McGraw]

I think so, it was the se results at 100 yards as well. I think Berger hybrids perform the best anywhere from 20-50 thou off the lands which in this case is 27thou

I thought Litz said 15 off as optimum onetime?
I would still be tempted to start in from touch and then start testing seating them deeper in the case.

 

[Mahziar]

Update:
went to the Range last week to finalize the load with seating depth
41.7grs H4350 with new jug was giving me 2790-2795 fps with low sd.

Shot this target at 600 yards with heavy mirage and 10-13mph wind from right to left.

settled on 41.7grs H4350 @2.106" C.B.T.O

 

[Eagle Six]

That looks good. Whether you shot it over flags or not, if it were me I would have another go around in that 2.1XX". The 2.103 looks good to me if the wind or bench setup might have caused some of the horizontal.

 

[Mahziar]

That looks good. Whether you shot it over flags or not, if it were me I would have another go around in that 2.1XX". The 2.103 looks good to me if the wind or bench setup might have caused some of the horizontal.

I didn’t care for the flags, just waited on condition
It’s probably wind, I was shooting prone

 

[Sandstorm]

Yea the less vertical the better . I too would rinse and repeat the test in that same area. 2.1xxx