![new combro cb-625 mk4 air rifle chronograph chronoscope new combro cb-625 mk4 air rifle chronograph chronoscope](https://cdn11.bigcommerce.com/s-hkv3fnh/images/stencil/1280x1280/products/3454/1168/cb625__76432.1417445463.jpg)
#New combro cb 625 mk4 air rifle chronograph chronoscope series#
The upside-down Caldwell seems to work better under low light conditions than any of the Chrony series (at least compared to my Alpha Chrony). i still use the standard unit when I’m not lazy. This is were I got it took about 10 days to arrive.
![new combro cb-625 mk4 air rifle chronograph chronoscope new combro cb-625 mk4 air rifle chronograph chronoscope](https://www.airgunmagazine.co.uk/wp-content/uploads/sites/6/2019/05/AGM121.not_group_test.airforceone-1024x877.jpg)
I have found that that once you figure out where in the inverted triangle (mine was half way up and only an inch or so height sweet spot) you must place the projectile it works fine Idid have the Caldwell unit your considering it worked well. I still use the standard unit when I’m not lazy. Frankly using a Crono was a pain in the ass necessity when fine tuning my air rifles by using the Combro I can quickly check my rifles performance and immediately make the proper adjustments.
![new combro cb-625 mk4 air rifle chronograph chronoscope new combro cb-625 mk4 air rifle chronograph chronoscope](https://www.precision-sports.com/combroMK4_new_below_sm.jpg)
Lately I have been using a small unit that attaches to the barrel that was made for air rifles it’s a Combro CB-625 mk IV I found it on eBay it comes from England it was realitivly inexpensive ($85) what I like best it only takes 10 seconds to attach and its extremely convenient no sun shield needed no tripod it can fit in a shirt pocket. Currently I have 2 types one is a Chrony beta master which is the Chrony top of the line it has all the bells and whistles and it comes with a printer. I have found that if used as instructed and if properly calibrated they are all decent. Over the years I have owned or used numerous models of chronographs.