New barrel ,new ladder test ,Well Sheet!!!Update

[Kelly Timoffee]

Today's update,

First off for Dave, I ran a ladder(at 250 yards) with Retumbo with the COAL of 3.500" , which will be shown shortly was not the seating depth that these projectiles like, I do believe that Retumbo would still work now that I do have a suitable seating depth.The Retumbo velocities did climb nicely in relation to charge weight and no pressure issues.There is marked fouler shots on the target.





Now, I picked a charge weight of 80gr of H1000 and went with a variation of Big Bore Dinosaur's suggestion as well as reading the Berger method(at 100 yards).I did 4 x 3 shot groups and then repeated 4 x 3 shot groups of the same COAL and charge weight.I did shoot on the same target for all six shots. I shot 3 on each target of each depth and then returned to the initial target to repeat with same COAL.

So what I did was a 0.010" jump , 0.050" , 0.090" and 0.130"

Here are the four target of those tests...



Closer shot of two targets at a time...





I have no reasoning for the results of shots 4,5 and 6 of the 0.130" jump



I am quite pleased with the seating depth test and how it works, I will be changing my combination of methods used for certain load developments.

***I have no reason for the velocity numbers, I do believe the clock was either being fussy having a problem or not liking the ideal shooting conditions, I did change the battery but still appeared to have issues, so I cannot comfortably put much weight into the accuracy of the velocity numbers but still use them as a loose guide.

As for those who are concerned about my flinch , intake of caffeine , my bad eye, having too much vodka , my bad scope or whatever my ailment may be it seems to only be there when the bullets jump is greater than 10 thousandths.

 

[horseman2]

I am really happy you found the node.
After seeing a number of your groups that your were doing an insanity test or worse yet it was either the nut that held the gun or the jerk that pulled the trigger.
Some great advice on this site.

 

[RonR]

Today's update,

First off for Dave, I ran a ladder(at 250 yards) with Retumbo with the COAL of 3.500" , which will be shown shortly was not the seating depth that these projectiles like, I do believe that Retumbo would still work now that I do have a suitable seating depth.The Retumbo velocities did climb nicely in relation to charge weight and no pressure issues.There is marked fouler shots on the target.





Now, I picked a charge weight of 80gr of H1000 and went with a variation of Big Bore Dinosaur's suggestion as well as reading the Berger method(at 100 yards).I did 4 x 3 shot groups and then repeated 4 x 3 shot groups of the same COAL and charge weight.I did shoot on the same target for all six shots. I shot 3 on each target of each depth and then returned to the initial target to repeat with same COAL.

So what I did was a 0.010" jump , 0.050" , 0.090" and 0.130"

Here are the four target of those tests...



Closer shot of two targets at a time...





I have no reasoning for the results of shots 4,5 and 6 of the 0.130" jump



I am quite pleased with the seating depth test and how it works, I will be changing my combination of methods used for certain load developments.

***I have no reason for the velocity numbers, I do believe the clock was either being fussy having a problem or not liking the ideal shooting conditions, I did change the battery but still appeared to have issues, so I cannot comfortably put much weight into the accuracy of the velocity numbers but still use them as a loose guide.

As for those who are concerned about my flinch , intake of caffeine , my bad eye, having too much vodka , my bad scope or whatever my ailment may be it seems to only be there when the bullets jump is greater than 10 thousandths.

Nice work Kelly. I learned something new with respect to seating/new methods. Ladder to kick it all off and then a version of OCW has worked in the past for me but this is interesting as heck. Thanks for sharing this. I'm just happy following along from the ladder test and believing / interpreting why you chose 80gr. to do the next test group at distance.

Regards
Ron

 

[Kelly Timoffee]

Nice work Kelly. I learned something new with respect to seating/new methods. Ladder to kick it all off and then a version of OCW has worked in the past for me but this is interesting as heck. Thanks for sharing this. I'm just happy following along from the ladder test and believing / interpreting why you chose 80gr. to do the next test group at distance.

Regards
Ron

Every session is a learning experience, if I knew 10% of what some on here know I'd consider myself educated!

Not really any scientifical witch craft or formula to it other than it was on the upper end of charge weights and didn't show any pressure signs , in my initial post(first photo) of that ladder the 78, 80 and 81 charges do seem to have somewhat of a node elevation wise , and it will have the speed to utilize the benefits of the LRAB to it's potential.

I could do this all year and not target shoot or hunt and still be happy,it can be quite the process some days and is satisfying when you finalize your testing with positive results.

 

[Markus]

Nice work Kelly. I'm glad to see some great results out of that rifle. It has also been my experience that high BC bullets like the LRAB and Berger VLD's are very sensitive to seating depth.