What really opened my eyes to how much a different primer can tune a load was about 12 years ago my nephew brought me a Ruger 338WM to work up a load for.What made you decide to change the primer? Was it the ES number or SD? Just a guess? I am curious because I typically start with a primer and stick to it. Thanks for any info
I'm not going to discount what you see, but in my experience, that is not the way things work.My experience is that whatever they do at 100 is real close to what they do farther out. If it shoots 3/4" at 100, it shoots 6" at 800, assuming no breeze anywhere, of course.
Maybe I just need to shoot more loads!
but a 3/4 moa rifle at 100 will never shoot 3/4moa at 800 or 1K.
The only exception to this may be bigger 338's and larger and personally, I don't attribute this phenomenon to bullet stability either.
I agree with your logic and my magneto speed V3 chronograph is my best friend . As you pointed out the tighter the vertical string is (E.S.) and the smaller the bullet placement is from point of aim (P.O.A.) the more accurate the load becomes. This is called the S.D.. Other than performing a ladder test(Satterlee) I think it is called, your chronograph is the best way to establish a successful load development.Blackhawk, good points, but most rifles capable of .500 and under groups have had the attention to details checked, dealt with and components are of the caliber that are capable of accuracy beyond the off the rack weapon. Most problems associated with poor accuracy at short range you address, normally flyers, non grouping, and erratic grouping are caused by the problems you pointed out. I am starting to subscribe to the theory of shooting at long range to check accuracy, and watching the es and sd to control the vertical...then adjusting components and seating depth to get the grouping I am looking for...The info on this forum is a gold mine....I thank all of you found the replies and advice , rsbhunter
I agree with your logic and my magneto speed V3 chronograph is my best friend . As you pointed out the tighter the vertical string is (E.S.) and the smaller the bullet placement is from point of aim (P.O.A.) the more accurate the load becomes. This is called the S.D.. Other than performing a ladder test(Satterlee) I think it is called, your chronograph is the best way to establish a successful load development.
Simply put as group size diminishes the lower the E.S. and S.D. numbers become. I myself keep working at both these numbers until I'm satisfied with my shot placement. I will start my load development at 100 yards and when I'm content with my numbers move out to 200 yards and beyond. I also carry with me my 3 ring binder which contains all per-tenant data as well as my actual targets which I print off an internet target generator site. At night I plug in my data from the chronograph to a spreadsheet in order to analyze it. This will give me an easy way to record , store , or compare records of previously shot reloads.
At the range I've had other shooters ask me just what I record, and why. To that I reply with what I've already answered above. Couple that with my actual targets and generally people will want to know more by asking questions.
I feel very fortunate to reply as knowledge and my opinion I feel is meant to be shared. This I was taught at a very early age from some very close mentors. What they instilled in me was that knowledge should be shared freely among those who are willing to listen , as there should be no great secrets in life that are kept locked away in a persons mind. Rather information should be freely exchanged with like minded souls. On the other side of the coin it is up to you as a individual to discern whether the information is valid or just so much nonsense.
I truly enjoy this web site, because of the quality of it's subscribers but more importantly the amount of quality information that is freely given.
To that end I wish to thank all of you for your posts, contributions , and time !