Thread: HOW IMPORTANT IS ES

OK, another of my "$0.02c".

I am relatively new to shooting, hunting and reloading but however i don't have much experience i do "research" A LOT.
In my understand, and what i think i learn with my research regards SD and ES are:

SD - is "somehow in MY understand" the "measurement or estimation" of how much the bullet vary from a "straight line" as it exit the muzzle of your rifle or pistol, saying it, i can not confirm if it is real or not or how it is measured during the process, but, as we all(or many of us here) talk about "concentricity" and "bullet alignment" during the seating process i think it is how they "ballisticians" "calculate or estimate how "far" the bullet path is from a "straight" line, if the bullet is seated not "centred" enough the path will be "unknown" with the POI varying with a higher "off alignment". So, if you shooting at long ranges it will affect your accuracy.

ES - is in my understand the measurement of "how consistent" your bullet velocity will be so it will "hit" closest to the "centre" or point of aim. If any of you guys watch Brian Litz videos i am sure you will find some more "technical" info there and with a lot more "quality" than my own "findings". the lesser is the speed variation the less chance the projectile will hit away of the centre.

Well, i think i wrote too much so i will stop here with a quick "conclusion". The smaller are the numbers achieved in SD and ES the better it will be(or should be), however other factors can and will contribute to the final "accuracy" with examples such, bullet seating depth, max velocity, case capacity, etc, etc, etc. so, if you really want to compete in F-Class and its variables or bench rest match you may need to "study" in depth all of these variables.

I hope it help a bit and i apologise if i wrote some or a lot of "BS" but as i said, it is only my understand. If someone here can clarify more or correct me please do it.

Thank you for your time.

Mac