Issues with load development
- Thread starter Stellawood
- Start date
I was thinking that and 41.2 looked decent. Not sure about 40.6 as well. Am I wrong to think that the 40.6 could be good and the two shots were just pulled to the right?
Your thinking is correct. But I wonder if these were shot round robin or each weight shot at on time. Overall there doesn’t seem to be a pattern. Charge weight doesn’t look like its the cause of the wild jumps in POI.
Each weight was shot at one time. By random jumps in poi do you mean the whole group moving vertically from 41.2 and down and the second group of 41.2 and up being closer to center of the target? If so, I adjusted my scope up since I shot one of my groups too low having it land off the target
what primers are you using?
sorry i totally missed it in your first post...your using CCI200s....id try a different/hotter primer and shoot the same charge weights as your last test again
sorry i totally missed it in your first post...your using CCI200s....id try a different/hotter primer and shoot the same charge weights as your last test again
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I assumed you adjusted your scope....as you say......I understand why you did that, but to evaluate these groups, we are focusing where they print in those inch squares that are on your paper target...On your next visit out to shoot, I would just use white typing paper with black dots, and let your groups fly above, or below. We're Looking for similarities in placement of two groups...not how tight one group is..... remember this...you chose .020" of the lands for these....so one charge is actually going to create a tiny cluster because of Coal,brass size, ambient temperature, distance to target, barrel heat, etc. All were perfect for that moment....but it's not the optimal charge that can endure all the variables, and fluctuations that Will (read guaranteed) occurr with all your equipment, and weather. I've personally taken the bughole groups from my OCW tests, and swung to 300yds, and they literally fall apart, or should I say, the don't equate mathematically to the .3moa at 100.
@karb
So going by that, I should be looking at 40.6-41.2 and 41.5-41.8? I know the 40.9 charge was just off the paper, roughly 2.5 squares just like the 40.6 and 41.2.
The order of how I shot/adjusted goes
Shot 40.3/40.6/40.9/41.2
Adjust elevation up
Shot second group of 41.2
Adjusted elevation down
Shot 41.5/41.8/42.2
The pictures didn’t post in the correct order. The correct order would be : 6/7/1/2/3/4/5
So going by that, I should be looking at 40.6-41.2 and 41.5-41.8? I know the 40.9 charge was just off the paper, roughly 2.5 squares just like the 40.6 and 41.2.
The order of how I shot/adjusted goes
Shot 40.3/40.6/40.9/41.2
Adjust elevation up
Shot second group of 41.2
Adjusted elevation down
Shot 41.5/41.8/42.2
The pictures didn’t post in the correct order. The correct order would be : 6/7/1/2/3/4/5
Karb’s screenshot post above is OCW in a nutshell. Can’t say i’ve ever seen a better explanation. Great job and credit to whoever posted it originally!
Go to
www.tapatalk.com
You can get the target many of us use for our test. Remember, don’t put your rounds into your aiming point.
Go to
Practical Riflery and OCW Forums-OCW OFFICIAL TEST TARGET
The file can be downloaded by clicking on the following links MOA Target in PDF format MOA Target in JPG format
www.tapatalk.com
You can get the target many of us use for our test. Remember, don’t put your rounds into your aiming point.
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Your 41.5 & 41.8 charge has POI (red circle) Inside an almost identical print .. 41.8 looks like promising.....if 41.6, 41.7, and 41.9 trend with similarities, then you are in a node....I would include 41.5 & 41.8 again for the fact that this brass will be resized and on a 3rd? Rotation....so it's not gonna print identical to this trip you just made. Nature of the game.
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So my next range trip what rounds should I load? Do I redo this whole test? And yes it’s on it’s 3rd reload
Couldn’t tell you, I’m fairly sure I didn’t make any scope changes so either I pulled them or that’s just how they landed
Went out to the range today. Shot a total of 32 rounds through the rifle, 8 at each charge. I shot 41.0/41.2/41.4/41.6. Took a break, then did the same process over again. 41.8 has a slightly sticky bolt so I stopped after 2 rounds.
I allowed time in between each group to allow the barrel to cool down.
I allowed time in between each group to allow the barrel to cool down.
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For some reason the pictures are being posted In the order I uploaded them. But The order the pictures should be in is 1/3/4/2 and second round of same charges goes 5/6/7/8.
Could you post a picture of all the groups from the sequence of charge weights? (two pictures) I like to compare where the adjacent groups are ending up.
Left side I shot first. Shot my other guns a little bit then shot right side. To me 41.2 looks promising, and so does 41.6
I just read through the thread. It looks like where we left off the loads 41.5 and 41.8 looked similar. If that previous work is still valid then I would use the 41.6 result from this most recent outing.
Looking at the most recent targets I'm not seeing a clear "sweet spot" when comparing the different loads in a individual sequence.
What contour barrel are you using?
Looking at the most recent targets I'm not seeing a clear "sweet spot" when comparing the different loads in a individual sequence.
What contour barrel are you using?
Hawkhill marksman contour. I still feel it’s a lot of shooter error that’s making the load development harder
At this point I think either something is amiss in the rifle setup, or there is a lot of shooter induced variation. There has been a lot of information posted here and almost all is good. But we don’t seem to be getting anywhere.
In the future i would suggest that you use a load development target. There are several available, you might try this one:
www.tapatalk.com
Fill out the information on the target so we can see what is going on. A single target or two with data makes for easy analysis.
Do not make setup or scope adjustments during the test. If you do you will almost always invalidate the test.
I would suggest you go to this site and and follow Dan Newberry ‘s procedure, not because it’s “THE” procedure but because it is a procedure that is documented and detailed.
Finally, invest in a box of Federal Gold Medal Match 140 gr Sierra Match King ammunition. Shoot this in several 3 round groups and see how the rifle and shooter perform.
In the future i would suggest that you use a load development target. There are several available, you might try this one:
Practical Riflery and OCW Forums-OCW OFFICIAL TEST TARGET
The file can be downloaded by clicking on the following links MOA Target in PDF format MOA Target in JPG format
www.tapatalk.com
Fill out the information on the target so we can see what is going on. A single target or two with data makes for easy analysis.
Do not make setup or scope adjustments during the test. If you do you will almost always invalidate the test.
I would suggest you go to this site and and follow Dan Newberry ‘s procedure, not because it’s “THE” procedure but because it is a procedure that is documented and detailed.
OCW instructions - Dan Newberry's OCW Load Development System
Dan Newberry OCW or Optimal Charge Weight Load Development method or system for handloading, reloading, bullets, brass, powder, primers, accurate handloads.
optimalchargeweight.embarqspace.com
Finally, invest in a box of Federal Gold Medal Match 140 gr Sierra Match King ammunition. Shoot this in several 3 round groups and see how the rifle and shooter perform.
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