Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature currently requires accessing the site using the built-in Safari browser.
You are using the old Black Responsive theme. We have installed a new dark theme for you, called UI.X. This will work better with the new upgrade of our software. You can select it at the bottom of any page.
That is a bummer they are discontinuing Tin Star. I used it for some good sub-sonic 450 Bushmasters loads. I am not sure your going to be able to get enough in a 300 BO case to push a reasonably heavy bullet to 1000 fps. I like Accurate 1680 and IMR 4227 for sub sonic 300 BO.
So your left to derive load data. I jokingly call the 300bo 357AR. This load data is the best I have but should give you an idea. Try and see if GRT has the powder. The 158 7.3 grain load is in the range you want to be.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.