I had the same question. Was running short on regular Winchester standard and had several thousand winchester small pistol magnum on hand so i did a test. using all same components with HS-6 powder, shooting a 10 shot string over my chrony, the magnums were 12 fps slower than the standard...
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.