I've been using a "Competition ProChronograph" for bows and air guns for about 8-9 years. I've always liked it but wondered if it was accurate. Yesterday I bought a Caldwell Ballistic Chronograph G2. The G2 is the "upside down" chronograph.
I compared them both today with my FX Wildcat .25. I'm happy to report that I "wasted" my money. Both are within a couple of FPS of each other (870-872 FPS with 25.39 grain JSB Exacts). I didn't really waste money. Now I have confidence in my readings. I like the rechargeable lithium battery of the G2. I also found out, with both chronographs, that the florescent lights on my home range don't affect my readings. I tried shots with the chronograph lights on and off. Readings are the same.
The only thing I don't like about BOTH these chronographs is their stability. The ProChronograph is a bit tippy (side to side) even when sitting on a flat service. I've knocked it over and broken the light hoods twice. I just super glue the small pieces back in place and no problem. The G2 fits on an included tripod. Because the body is so large, the single contact on the tripod also causes this unit to be a bit rocky. Of course once set up level it stays in place.
Something I thought was odd. I changed out gauges on my FX two days ago. To do this all the air came out of the rifles air tube. I filled the gun back up to 230. My first few shots (4-5) started at 740 FPS and climbed to 872 before stabilizing. The rifle had never done that before. Often times the first shot has been about 840 but then right to 865-872 FPS. I suppose completely draining the tube and refilling has something to do with this?
I compared them both today with my FX Wildcat .25. I'm happy to report that I "wasted" my money. Both are within a couple of FPS of each other (870-872 FPS with 25.39 grain JSB Exacts). I didn't really waste money. Now I have confidence in my readings. I like the rechargeable lithium battery of the G2. I also found out, with both chronographs, that the florescent lights on my home range don't affect my readings. I tried shots with the chronograph lights on and off. Readings are the same.
The only thing I don't like about BOTH these chronographs is their stability. The ProChronograph is a bit tippy (side to side) even when sitting on a flat service. I've knocked it over and broken the light hoods twice. I just super glue the small pieces back in place and no problem. The G2 fits on an included tripod. Because the body is so large, the single contact on the tripod also causes this unit to be a bit rocky. Of course once set up level it stays in place.
Something I thought was odd. I changed out gauges on my FX two days ago. To do this all the air came out of the rifles air tube. I filled the gun back up to 230. My first few shots (4-5) started at 740 FPS and climbed to 872 before stabilizing. The rifle had never done that before. Often times the first shot has been about 840 but then right to 865-872 FPS. I suppose completely draining the tube and refilling has something to do with this?