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accuracy
In a set of measurements, accuracy is closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other.
Accuracy has two definitions:
More commonly, it is a description of systematic errors, a measure of statistical bias; low accuracy causes a difference between a result and a "true" value. ISO calls this trueness.
Alternatively, ISO defines accuracy as describing a combination of both types of observational error above (random and systematic), so high accuracy requires both high precision and high trueness.Precision is a description of random errors, a measure of statistical variability.
In simpler terms, given a set of data points from repeated measurements of the same quantity, the set can be said to be accurate if their average is close to the true value of the quantity being measured, while the set can be said to be precise if the values are close to each other. In the first, more common definition of "accuracy" above, the two concepts are independent of each other, so a particular set of data can be said to be either accurate, or precise, or both, or neither.
Just wondering what people use as a standard to say they have an accurate gun. Testing at 25 feet with a rest? What size group?
I'm guessing with most handguns it almost doesn't matter, but for (say) a trail gun or something along those lines it might be a factor.
I’ve never used open sights before, this is my first time. I zeroed my AR at 100yds with M193 and came up with about a 3"... maybe 3.5" group at the end of the day. Is that good or bad?
next I want to try some premium loads in .223 to compare, but that’s another day. I'm not certain how...
Its this one here. AI 34mm Standard Dovetail Scope mount 18 MOA 3027 FOR SALE! - EuroOptic.com Its in pretty darn good shape. I'd take $105 shipped or interesting trades. I do need some Mossberg US44 parts. Triggers, barrel bands, bolts. Other stuff. Let me know.
I detest starlings. Was cutting some wood and saw some in the neighbor's tree again. Tree huger type. Nice folks though. But anyway, figured I'd scare them off. The birds not the neighbors. Pulled a Remington NPSS, .22 off the rack. Have not shot this since last summer, so I guess 60 yards 75...