Quickest way to find an accurate load
- Thread starter Gobears16
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lightshooter
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SD is Standard Deviation; how different is the speed of 1 round different from the average of the rest in that charge weight. Lower the better.
OP: If this another 28 Nosler barrel, don't you a;ready have data?!
Gobears16
Well-Known Member
I do have load data and I'll start there. It just got me thinking about what others do when they start their initial load development. I'm sticking with 195gr EOL, Reloader 33 84-87gr, nosler brass, federal 215m... I read through hours of data and it's good to hear my process is similar to others. Just wanted to throw the question out there and see if some people had a process that was different, many ways to skin the cat!
J E Custom
Well-Known Member
Standard Deviation. (The average difference in velocity round to round
Extreme Spread (ES) is the other measurement used for consistency and Is the Highest velocity compared to the lowest velocity in a test loading.
J E CUSTOM
RL26 isn't a temp stable powder? First I've seen that in print.
Wedgy
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"sort of" ..... it is very stable until it get to ~84F then it pressures up fast making it unsuitable for hot climates like me and the OP in CA summers. If you can stay below that it's a fantastic powder and gives some ridiculous speeds !
fiftybmg
Well-Known Member
3" at 1000 yards is 0.3 MOA, 1/2" at 100 is 0.5 MOA. Most people would consider that good accuracy.
Generally, anything sub-moa is understood as accurate.
Rhovee
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That's what math says. But a load that shoots 1/2"'at 100 doesn't meant it's going to shoot 5" at 1k unless it was developed at distance. Trust me on that. Most people think that's the case. Find a 1/2" group at 100 and she'll be a good 5" shooter at 1k.
jasent
Well-Known Member
When I'm starting load development I'll start with a low charge. Load up some 3 shot groups starting at .015" off the landes or mag length which ever is shorter and seat each group deeper by .030".
Which ever shot best I'll use that seating depth for my load work. I shoot a ladder over my chrono ( I use magneto speed, must have an accurate chrono for this!) target dosent matter. Look for my upper flat spot near max. Then I'll load up 5 shot groups and fine tune my seating depth in .005" increments.
If you don't have a magneto speed or labradar then you could do 3 shot ladder test at 300 yards.
This is my method that's worked well for me. Yrmv
Which ever shot best I'll use that seating depth for my load work. I shoot a ladder over my chrono ( I use magneto speed, must have an accurate chrono for this!) target dosent matter. Look for my upper flat spot near max. Then I'll load up 5 shot groups and fine tune my seating depth in .005" increments.
If you don't have a magneto speed or labradar then you could do 3 shot ladder test at 300 yards.
This is my method that's worked well for me. Yrmv
Start by asking the builder if the gun you are buying is capable of .25 moa! Often our expectations far surpass the capabilities of our equipment. Many manufacturers will guarantee sub moa as long as you are capable of shooting sub moa....however bare in mind that .999 is sub moa to the builder.
Sorry you said .5....same thing applies though.
Yeah! It gets real nasty, real fast, after 84F!
Rick Richard
Well-Known Member
Very few people can achieve that accuracy at that range even with a "bench" gun.
