Just came back from range test of my Magnetospeed compared to my old Pro-Tach . For 15 shoots with 5 different loads the Difference was 33 FPS.
the Pro-Tach was 15 feet from the muzzle. Magnetospeed got 3023fps and the pro-tach got 2990fps. from 15 shoots with 5 different loads in a 270 Winchester
That's close enough for me. I shoot a similar load in the 257 roberts model 70 and the 760 Remington, it was 48.5gr of RL26 115gr Nosler partition win case and CCI250 primers
I got 3133fps with the model 70 and 3008 fps with the model 760 Remington. . Model 70 has a 24 inch barrel and the 760 Remington has a 22 inch barrel.
