I am sorry that my first post begins with something like this, i quote downwards the letter sent to Bushnell.com for that they don't give me an answer: Hello, i am coming again after 2 weeks to please you to figure me out. As an european, i use european industrial cartridges and muzzles for target shooting. I have buy the Elite 1600 ARC laser rangefinder to help me compensate the angel of shooting. Unfortunately i cannot do this with your product because the ammo that i use (which is convenient for me regarding price/precision) it is not included in the rangefinder's database (ballistic group..A,B,C....etc.). Please tell me which is the ballistic group for the following ammo's: 1. Geco Target 170gr. (BC=0.305;V=2647fps;E(J)=2564) 2. Geco Teilmantel/SP 170gr.(BC=0.305;V=2647fps;E(J)=2564) 3. Geco Plus 170gr.(BC=0.274;V=2657fps;E(J)=3609) 4. RWS EVO 183.6gr.(BC=0.366;V=2542fps;E(J)=3574) I please you again to tell me which is the ballistic group for those ammo's and it would be great if you will update the ballistic groups from your website, because there are many people interested, especially those who buy and use your products. For example, i have another 2 optical devices from you... I hope for an answer sooner, Best regards. Actually, this is the second mail that i have tried to sent them, but now the site doesn't let me send any message (despite the fact that i am logged on the site)... I am very disapointed by their treatment, considering that i have already 3 products buyed from them (as an european)... I am asking you if this what happened to me is just an exception, or have you have been to in this situation??? I would be very pleased if someone on this forum can help me with the question that i asked Bushnell.com Thank you.