300 win mag Ladder Results

[DoubleGobble00]

Below are the results from a 250 ladder test. I really need more yardage.

300 win mag
8133 powder
215M
ABM brass 1x
250 yards
215 Berger

DoubleG

 

[ar10ar15man]

silly question,
did you start flinching ?
77.5 thru 79.5
lo but the first three look good

 

[DoubleGobble00]

Ha... I didn't feel like I flinched but human error is definitely possible.

 

[ar10ar15man]

re shoot or group shoot something between 77 to 79
or settle for the low end which looks good

Ha... I didn't feel like I flinched but human error is definitely possible.

 

[Canhunter35]

Maybe a seating depth test first, I'm not seeing any patterns

 

[ar10ar15man]

to me that is backwards.
find a node and THEN fine tune.

Maybe a seating depth test first, I'm not seeing any patterns

 

[Canhunter35]

to me that is backwards.
find a node and THEN fine tune.

Perhaps, but I'm thinking a coarse depth adjustment, then another ladder test that will hopefully give less random results. Followed by fine tuning the seating depth

 

[Jeffrey Van Zandt]

is this load you are working on for target or hunting the speed is way low for a 300 win. out of all the first 2 look best

 

[Danehunter]

"ar10..." is correct. Get a good grouping load THEN do the ladder test.

Remember, a "ladder test" is to test the SCOPE turrets and their accuracy of adjustment. **(Your scope must have been perfectly vertically mounted and you MUST shoot using a scope level.)

Another even better ladder test is a vertical ladder with a 3 foot exactly vertical line on a big cardboard target. Use a level to get it exactly vertical. On that vertical line draw 6" horizontal lines 3 3/8" apart (for mil turrets).

Shoot 3 shots at the lowest "rung" then click your scope ONE mil up.
BUT KEEP YOUR CROSSHAIR ON THE LOWEST "RUNG" . Then shoot 3 more shots.
Keep clicking up one mill and keep aiming at the bottom rung. You will see if your scope is clicking up at the proper amount AND if your reticle is perfectly vertical.

If your shots gradually wander left or right as you go up the ladder you have a reticle out of vertical GIVEN that the scope is mounted exactly vertical and you used a scope level for shooting.

Eric B.

 

[hwy1strat]

"ar10..." is correct. Get a good grouping load THEN do the ladder test.

Remember, a "ladder test" is to test the SCOPE turrets and their accuracy of adjustment. **(Your scope must have been perfectly vertically mounted and you MUST shoot using a scope level.)

Another even better ladder test is a vertical ladder with a 3 foot exactly vertical line on a big cardboard target. Use a level to get it exactly vertical. On that vertical line draw 6" horizontal lines 3 3/8" apart (for mil turrets).

Shoot 3 shots at the lowest "rung" then click your scope ONE mil up.
BUT KEEP YOUR CROSSHAIR ON THE LOWEST "RUNG" . Then shoot 3 more shots.
Keep clicking up one mill and keep aiming at the bottom rung. You will see if your scope is clicking up at the proper amount AND if your reticle is perfectly vertical.

If your shots gradually wander left or right as you go up the ladder you have a reticle out of vertical GIVEN that the scope is mounted exactly vertical and you used a scope level for shooting.

Eric B.

This is completely wrong... you are talking about a tall target test. The OP is correct in calling what he did a ladder test. Ladder tests are used to find velocity nodes, not test a scopes tracking ability. Even Ar10 isn't referring to the same thing you are. He is saying that the OP is correct in doing a ladder test first and then he should play with seating depth to "tune" the load so it groups well.

 

[Wedgy]

Some confusion here; the seating depth test mentioned is listed on Berger's site and they say to do it FIRST, it is a rough test for VLD's not for fine tuning.
A ladder test is not to test your scope, that's a tall target test. 250 yards is going to be hard to tell anything regardless, stretch it as far as you can. Don't shoot it with an MS attached. Brass should be formed already.
The well known combo for the 300Win and Berger 215 is H1000 215M between 76 gr and 77gr(high node) with the H1000 very near or above 3,000 fps, some higher, some lower. H1000 is among the most stable powders and hard to beat.
https://www.6mmbr.com/laddertest.html

 

[hwy1strat]

The 215's are not VLD's and are not as sensitive to seating depth. VLD's are extremely sensitive to their seating depth due to the rapid transition from the ogive to the bearing surface. That is why Berger recommends it for them first. Everyone has their methods, but I think a lot of people like to find a velocity node first, then tune it to group well by adjusting seating depth for most other bullets

 

[Danehunter]

I stand corrected. What I described is a Tall Target Test. A Ladder Test is for load testing. "Old Timer's" Disease!

Eric B.

 

[Canhunter35]

The 215's are not VLD's and are not as sensitive to seating depth. VLD's are extremely sensitive to their seating depth due to the rapid transition from the ogive to the bearing surface. That is why Berger recommends it for them first. Everyone has their methods, but I think a lot of people like to find a velocity node first, then tune it to group well by adjusting seating depth for most other bullets

I'm not saying seating depth should always be first, but it's another idea to get a more discernible ladder test. At the moment the only thing working is starting loads. Maybe powder choice is another, aside from shooter error
Btw Berger recommends a seating depth for all their bullets, ask one of their technicians. I have