Load development help for 300 wm

Majja13

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I think i finally found a bullet my old Abolt likes. These are all with berger 210 vlds seated to 3.50 (i made a modification. To my mag to seat longer) temp is 89 F 21% humidity at about 4200 ft elevation.

I know i need a chronograph. That is in the works.

Which of these groups would you star working with.
 

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DUSTY NOGGIN

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my first choice would be the chrono, IMO those are all very similar and id take whichever one has the tightest velocity spread

the 75 if you had to load 20 to hunt with now based off those pics
 

Majja13

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my first choice would be the chrono, IMO those are all very similar and id take whichever one has the tightest velocity spread

the 75 if you had to load 20 to hunt with now based off those pics
Thanks Dusty that is what I was thinking.
 

rfurman24

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The good thing is they all appear to impact the target at the same poi which means it is fairly stable. I would play with seating depth at 75.0 grains. I would also play with powder +.2 and -.2 grains.
 

L.Sherm

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Do a ladder test at 300 with 75.0, 75.5 and 76.0 pick the best of the 3 then tweak your seating depth.
 

rfurman24

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Useful ladders are not done at 300. The way he started load development he can just look at the results like an OCW. I prefer ladders, which need to be done no closer than 500 really farther to see a discrepancy in vertical which you will not see at 300.
 

L.Sherm

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I agree the farther you can stretch it out the better but not everybody has a place to do that.
Is the OP comfortable at 500 yards and beyond doing a ladder?
300 will tell him more than 100yd.
 

bob4

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I agree the farther you can stretch it out the better but not everybody has a place to do that.
Is the OP comfortable at 500 yards and beyond doing a ladder?
300 will tell him more than 100yd.
I agree. Myself, I have to travel a long ways to shoot past 200. So I work with what I have and then take it further.
To the OP. yup, between 75 and 76 you have something going on there.
 

rfurman24

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Ya, if you do not have 500 plus yards use the OCW method at 100. It works just as well it just takes more shots. A "ladder" at 300 yards isn't a ladder and will tell you nothing.

To the OP stick with the path you are on play with seating depth and maybe try slight up and down in powder charge as suggested earlier and you will have an accurate and stable load judging by the pics.
 

ForeverZ01

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Useful ladders can be done at 300 provided you use a good chronograph, the velocities tell more than bullet impact.
 

rfurman24

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Useful ladders can be done at 300 provided you use a good chronograph, the velocities tell more than bullet impact.

I can show you multiple targets and chrono readings that disagree. Do what works for you but if I need a long range load I’ll stick with ladders at 7-800 yards. The statement about bullet impact not telling as much as velocity is the most ludicrous thing I’ve heard as far as load development. Bullet impact is all I care about when it comes down to it. It doesn’t matter what your chrono says if your vertical is small at 1000 yards. At that distance the target doesn’t lie. As far as shooting at short distances I can show you even more accurate loads and/or small es/sd loads that would not hold up long range. I’ve NEVER found a node using a ladder at 700 plus yards that would hold up and do it in many different conditions. Have I found accurate repeatable loads at short range? Absolutely but it always takes more shots.
 
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