12-03-2021, 06:03 AM
LRRPF52 Wrote:G1 is fine out to 600yds with most Spitzer bullets traveling decent speeds.
Use G7 drag model past 600yds as a general rule where it will give you better predictions.
This is for bullets without doppler Radar data.
If your SD is truly only 2fps, thatÂ’s world-class SD. How many sample sizes for that SD?
Yeah, it's kind of crazy - especially since they are Chargemaster 1500 drops. I did 4 shot groups and this was the ladder (velocity/sd/es). 27.2 and 27.5 strung horizontally and 27.5 was getting a bit warm and 27.8 was too much. 26.6 seemed the spot to go since +/- 0.3 gr were only +/- 20 fps.
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Temp was 82 for the ladder and about 72 this morning. It was a lot easier to see impacts on the 440 this morning than the 550 and the first 2 I did were a few inches apart at the same elevation. I adjusted the 0.2 mils and put one right on the other dead center. It'll probably be 2 weeks, but I'm definitely interested in seeing what a 10 shot string does. Also interested to see velocity when it gets down into the 50s.
Let's go Brandon!