Picked up the Magnetospeed Sporter a month or two ago, and while it worked very well at the range the one time I managed to get out there, the XFR unit (their dongle for moving data from the display to a phone for emailing) didn't get along with my iPhone 4S... but that's another thread on here somewhere.
Anyway, after a couple of emails to Magnetospeed support (who provided very quick turn-around via e-mail), they offered to take back the XFR unit ($25 USD) and the Sporter display ($80) and send me a Version 3 display ($160) in return, as I had expressed a bit of unhappiness over the one-button interface - the version 3 had three buttons and a larger display. Needless to say, I took the offer immediately.
I finally took the new hybrid unit (Sporter sensor with a V3 display) out to the range earlier this week and it worked as well as I could have hoped for. The only adjustment required was that I had to crank up the sensitivity a bit as I was shooting a heavy (thick) barrel with .223 projectiles - the unit missed the first shot, I made the adjustment, and all shots after that were logged successfully.
Unfortunately, I can't give an indication of POI shift, as I was working up a new load and didn't think to take any shots without the bayonet in place. I'll try to post a follow-up when I get a chance to go shooting again, er, to generate more data...
However, I can report that the rifle was shooting .5" groups and smaller at 100 yards with the bayonet in place, so I don't think the unit is affecting group size negatively.
To sum up:
- the product works very well;
- support was there for me; and
- the company is definitely customer-oriented - even to us Canucks!
ShooNew