Long range load development at 100 yards.

[CA_Shooter]

Any takers on this grouping?

6.5 creedmoor
ELD 140s

Did 2 tests. 2nd test had some 5-10 mph wind which I tried waiting to subside each shot because it would move the target (on pvc stand)

 

[GooseNZ]

3% under the manual, as they are typically very conservative.

Or, share what combination of components and chambering you are using and just ask this forum for what others have found to be successful.

Thanks...

.308
180gr. Berger Elite Hunter
Varget
CCI Primers

 

[Bc'z]

Temps/humidity just won't cooperate for the rest of this week so I went back out to try to narrow things down. I think I need to explore targets 6 thru 9 in more detail. What I don't get is target 7. Is it possible that is generating a harmonic where the muzzle is on an up cycle where 6 and 8 are on a down cycle? What ya'll think?View attachment 1191403

Load 38gr.

 

[David Christian]

Any takers on this grouping?

6.5 creedmoor
ELD 140s

Did 2 tests. 2nd test had some 5-10 mph wind which I tried waiting to subside each shot because it would move the target (on pvc stand)

From both the picture as well as your speed data, somewhere around 41 might show you promise. I would load up .1 grain increments from 40.6 to 41.4 and test again. Good luck!

 

[CA_Shooter]

From both the picture as well as your speed data, somewhere around 41 might show you promise. I would load up .1 grain increments from 40.6 to 41.4 and test again. Good luck!

Thanks for taking a look and providing feedback!

This was my thought too. That range, especially with the FPS flattening seems like a good spot.

 

[RetiredArmy]

OCW test done by the instructions. 100 yards 70 degrees no wind. Shot round robin, 1 min between shots. If I understand the concept im seeing a Good node from 39.9 to 40.7. Would you load the middle of this and test seating depth? This is all new to me so let me have it.
Thanks Bill

 

[Bc'z]

View attachment 1197239 OCW test done by the instructions. 100 yards 70 degrees no wind. Shot round robin, 1 min between shots. If I understand the concept im seeing a Good node from 39.9 to 40.7. Would you load the middle of this and test seating depth? This is all new to me so let me have it.
Thanks Bill View attachment 1197239

40.5 seating depth test

 

[RetiredArmy]

40.5 seating depth test

Bc'z, Thanks for replying. If you don't mind telling me why you picked 40.5? As said in my post this is new to me and I'm trying to figure out (learn) how to read what the target is telling me. I've always been that guy that picked the smallest group in my test. Usually fall apart.
Thanks Bill

 

[Bc'z]

Bc'z, Thanks for replying. If you don't mind telling me why you picked 40.5? As said in my post this is new to me and I'm trying to figure out (learn) how to read what the target is telling me. I've always been that guy that picked the smallest group in my test. Usually fall apart.
Thanks Bill

Elevation of impacts.
40.3 & 40.7 are on the same plane,and the lowest on target. This is telling me the bullet is leaving the muzzle at the bottom of the barrel whip
39.5 & 39.9 are up, so are groups 41.1 and beyond.
If you load 3 each in .1 increments and reshoot at longer distance you'll see something that stands out.
Color tips of bullets to the ogive with different colors of sharpie and shoot at 1 aiming point. I dont shoot round robin as I want to shoot each charge in the most consistent condition for testing.

 

[RetiredArmy]

^^^
Thank you
Bill

 

[Tempest]

Erik's recent video on seating depth nodes got me interested in testing some loads again. Tested 1st at 100 yards like this topic. Then the plan was to move to 1,000 but the target camera was broken. So did the seating depth test at 600 yards. Did them in increments of .003".

Turns out the best group with least vertical at 100 yards was same at 600.

 

[RedfootRanch]

Having never attempted doing load development as Erik suggests, I thought I'd give it a go with a new bbl. Mind you these were shot in a 15 mph wind at about 255 degrees, I see nothing conclusive. Thoughts please?

 

[Ccrider]

I would load 43.5, 43.6 and 43.7. See what it looked like. Summary like you are holding vertical there an horizontal likely the wind.

 

[Brians356]

Tough to do this in 15 mph wind, even ignoring horizontal spread.
-

 

[gunsandgunsmithing]

Having never attempted doing load development as Erik suggests, I thought I'd give it a go with a new bbl. Mind you these were shot in a 15 mph wind at about 255 degrees, I see nothing conclusive. Thoughts please?

The 42.0 looks pretty good but I'm seeing a pattern there that would need to be addressed, whatever it is. That being, most of the groups are diagonal up and to the right. There is no wind condition that will do that from a rh twist bbl. It's tune, gun handling mistakes or something in the rest setup, IME.

I'd also change powder charges in a little smaller increments, like .2 or .3 of a gr at a time. Just my 2 cents though. I still think you have something else going on with handling or setup. What trigger/pull weight and a little gun and rest info might help.

 

[RedfootRanch]

The 42.0 looks pretty good but I'm seeing a pattern there that would need to be addressed, whatever it is. That being, most of the groups are diagonal up and to the right. There is no wind condition that will do that from a rh twist bbl. It's tune, gun handling mistakes or something in the rest setup, IME.

I'd also change powder charges in a little smaller increments, like .2 or .3 of a gr at a time. Just my 2 cents though. I still think you have something else going on with handling or setup. What trigger/pull weight and a little gun and rest info might help.

First off, seeing that have less than 200 of these bullets which will be the demise of coyotes and I plan to no longer use, I figured this was a good place to try something different after following this thread. When I got home and ran the velocity numbers in a spreadsheet I normally use, similar to the Satterlee method, 42.0 was the only thing that began to show a node and honestly I would scrap this bullet/powder combination if I had 1k or more of these bullets. I had 5 pieces of brass left from this batch to load prior to prepping for the next firing. I loaded those up and shoot a .275 5-shot group with them. With this few remaining bullets, if I get little to no vertical dispersion at 300 yds. I don't plan on fooling with seating depth tune for this load and will save these for their intended purpose.

I normally only load .3 gr increments in this size case but was trying to follow Erik's .5 gr basis a little closer. My 17's and 204's get .2 gr workups. This rifle has never been zeroed as anything I have put through it has been with a MS hung off the end. The trigger pull is 1.25 lbs and here's a pic of my setup.



I generally do all initial load development with this setup basically shooting free recoil to eliminate as much human error as I can. I then shoot my groups from a bipod without the MS and zero my scope from there.

I am loading a 20 at 42.0 to shoot tomorrow get a bit more MV data for Strelok. The remaining will be to zero and shoot a tall target test.

PS - This is my first go with a chassis and I much prefer a stock. This barreled action will go into a stock that is out being inlet for bottom metal at this time.

 

[gunsandgunsmithing]

First off, seeing that have less than 200 of these bullets which will be the demise of coyotes and I plan to no longer use, I figured this was a good place to try something different after following this thread. When I got home and ran the velocity numbers in an spreadsheet I normally use, similar to the Satterlee method, 42.0 was the only thing that began to show a node and honestly I would scrap this bullet/powder combination if I had 1k or more of these bullets. I had 5 pieces of brass left from this batch to load prior to prepping for the next firing. I loaded those up and shoot a .275 5-shot group with them. With this few remaining bullets, if I get little to no vertical dispersion at 300 yds. I don't plan on fooling with seating depth tune for this load and will save these for their intended purpose.

I normally only load .3 gr increments in this size case but was trying to follow Erik's .5 gr basis a little closer. My 17's and 204's get .2 gr workups. This rifle has never been zeroed as anything I have put through it has been with a MS hung off the end. The trigger pull is 1.25 lbs and here's a pic of my setup.



I generally do all initial load development with this setup basically shooting free recoil to eliminate as much human error as I can. I then shoot my groups from a bipod without the MS and zero my scope from there.

I am loading a 20 at 42.0 to shoot tomorrow get a bit more MV data for Strelok. The remaining will be to zero and shoot a tall target test.

PS - This is my first go with a chassis and I much prefer a stock. This barreled action will go into a stock that is out being inlet for bottom metal at this time.

Ok...Nice rifle and thanks for the details. I wish you the best with it.

 

[RedfootRanch]

Ok...Nice rifle and thanks for the details. I wish you the best with it.

Thanks, I am just trying to see if I am reading my targets correctly compared to the guys that have been using this method. I feel this bullet/combo is not a good choice. Am I missing something here or reading this target as other's with way more experience in this method would see it?

With my 'normal' way of LD with .3 gr increments I usually see a low and a high node. I feel with .4 gains, I may have missed something here.

Thanks for your input!

 

[Killick]

Just got back from the range to confirm my load (52.2gr. 4350). I also tried some lighter loads in .2gr. increments. Looks like it has good company for warmer weather starting at 51.6gr.

 

[TxCoyote1]

New here, please let me know what you would do looking at these groups. I am thinking of going with the 42.0gr group and possibly play with seating depth if needed. Thanks.