Bergara Premier Highlander | .300 Win Mag Hand Loads Help

dmossu

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Minuteman
Mar 18, 2021
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2
Pennsylvania
Does anyone out there have a good starting point for a Bergara Premier Highlander in .300 Win Mag?

I was thinking Berger 215's and H1000 - has anyone used a similar load in their Highlander? Not sure where to start load development, Berger recommends starting .015 off the lands and working back into the case all with 70.5gr of H1000. 70.5gr kind of seems light to me to start with, but I could be wrong
 

Northern Viking

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Minuteman
Mar 1, 2019
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1
Brass?? what kind of brass, I used Winchester and Remington and ADG. The ADG stuff is excellent but definitely had to reduce the charge for the ADG brass. A pretty standard loading is 75.5 grains of H1000 Fed 215GM or CCI 250 primer and the 215 Berger. This has worked well as a node for many, but work up to it. I would start at 73 grains, find the max in your combo, then adjust COAL seating depth.
 
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dmossu

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Mar 18, 2021
52
2
Pennsylvania
Brass is Norma. Still have not gotten great groups. I performed a velocity test on my chrono and found a node at 75gr (only 2,700 fps though). Still can't get these 215's to group in the Bergara though. Thinking about going to 210's or 205's
 

918v

It’s not the primer!
Full Member
Minuteman
Jul 15, 2007
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In Norma brass you should end up around 80 grains at around 2950 FPS. You’re way too low on the charge weight.
 
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918v

It’s not the primer!
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Jul 15, 2007
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Do 77 to 80 in half grain increments. Watch for pressure. It will all come together on top.
 
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dmossu

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Mar 18, 2021
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Pennsylvania
I went up to 77, not above though, see test below. No pressure signs at 77

SmartSelect_20210531-090154_Excel.jpg
 

dmossu

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Mar 18, 2021
52
2
Pennsylvania
Don’t shoot groups until you know where the load maxes out. Save the bullets. They’re precious.
Yeah I was mainly looking at finding a node here, which was the 75 - but I assume that there will be another node higher than 77 somewhere. Not a huge velocity change between 74 and 77 gr
 

dmossu

Private
Minuteman
Mar 18, 2021
52
2
Pennsylvania
Don’t shoot groups until you know where the load maxes out. Save the bullets. They’re precious.
Also talked to some others and realized that the chrono could be wrong - which would explain how low the velocity is showing on this test. Many people have recommended I do an OCW test and look at the actual results on the target
 

918v

It’s not the primer!
Full Member
Minuteman
Jul 15, 2007
5,853
3,040
Miserable CA
Also talked to some others and realized that the chrono could be wrong - which would explain how low the velocity is showing on this test. Many people have recommended I do an OCW test and look at the actual results on the target

I don’t think so. The velocity you reported makes sense. Norma is thin brass and you need a couple more grains of powder just to make published velocity.