I purchased a MagnetoSpeed Sporter Chronograph and have used it on two separate Range outings so far. The Chronograph was easy to attach to the end of my barrel (6.5 Creedmoor) and appeared to be working fine (although it never gets the 1st shot accuracy correct - think it uses this for calibration or something. I discovered a couple things that I did not realize initially; 1) having the Chronograph hung over the end of the barrel somehow affects the accuracy of my shots - perhaps this is well known but something I wasn't aware of and 2) when I shoot 3 sets of 20 rounds in succession (with breaks in-between), I notice the bullets velocity increases quite a bit from the 1st set to the 3rd set. I'm assuming the accuracy issue is because you are clamping this thing to the barrel and affect the barrel harmonics and/or the bullet's path over the 10" of Chronograph somehow affects its flight slightly. Regarding the increase in bullet velocity, I'm assuming this is a result of some light fouling that increases the pressure inside the barrel but not sure on this. I'd like to hear back from the experts out there on their take of what is going on.
Gun: Palmetto State Armory PA-65 Gen 3; 6.5 Creedmoor; 20" Barrel
Ammo: S&B 140 Gr FMJ
Range: 200 Yard Benchrest (shot both 100 Yard & 200 Yard Targets)
Location: Malabar, FL (PMRPC)
Gun: Palmetto State Armory PA-65 Gen 3; 6.5 Creedmoor; 20" Barrel
Ammo: S&B 140 Gr FMJ
Range: 200 Yard Benchrest (shot both 100 Yard & 200 Yard Targets)
Location: Malabar, FL (PMRPC)