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?

 

[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

 

[Mahziar]

@ 100 yards everything looks good.

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

 

[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

 

[boltfluter]

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

View attachment 1553559

View attachment 1553564

That's a great group considering the conditions and shooting from a bipod. A few more trips will tell you If this load will hold together. If it shoots you will just know as it will be easy. Iffy loads will do unexplainable things. Good luck and keep us updated.
Paul