Re: Load Development Ruger Precision Rifle .243 After learning that bench rest reloading was far superior, we are getting closer to our final load. We needed to get extreme spreads down.
We shot 4 primers with H4831sc. I read magnum primers might be a better choice for the slower burning powders we tried them and it appeared the extreme spreads were getting better and the accuarcy was ok. You could probably develop a decent load with them
All shot with 42.5 grains. 4 shot groups Primers 250 avg 2930 FPS. 22 ES. 1.26 moa 215 avg. 2940. 30 ES .493 moa 215m 2960. 18 ES 1.2 moa S&B. 2930. 35.ES .656. moa Three rounds .2ish moa
You can already see the drop in extreme spreads occurring
We then tested 42.8 of 7828 for group size. Russ was shooting these groups. I think he is a little better shot but don't tell him that
42.8 grains. 210 m. 6 shot. First shot cold bore 5 shots .414 moa. Cold bore making it .785 total.
44.2 grains. 210 m. 6 shot. 5 shots. .565 moa with one flyer.
