I went to the range last weekend to check out my new MagnetoSpeed V3 chronograph. I also wanted to find out velocity and check pressure of some hand loads from my RAR 450BM.
I shot 15 rounds of Barnes 200gr XPB bullets over Lil-Gun and CCI 450 primers. I started with 40gr at 2447 FPS and ended with 47gr at 2583 FPS.
Next I shot 7 rounds of Hornady 240gr XTP Mag bullets over Lil-Gun with CCI 450 primers. I started with 34gr at 2156 FPS and ended with 37gr at 2306 FPS.
Next I shot 7 rounds of Hornady 240gr XTP Mag bullets over H110 with CCI 450 primers. I started with 36gr at 2039 FPS and ended with 39gr at 2230 FPS.
Lastly I shot 10 rounds of Barnes 275gr XPB bullets over H110 with CCI 450 primers. I started with 36gr at 1952 FPS and ended with 40.5gr at 2245 FPS.
I only shot 7 rounds each of the Hornady 240gr strings as Hornady recommended that they shouldn't be loaded over 2200 FPS.
I had no signs of over pressure by checking primers or over swelling of case above case head which I measured with a blade micrometer.
The chronograph worked great with no missed shots. I hope this information will be useful for anyone wanting to reload for the 450 Bushmaster in the Ruger American Ranch.