I've only got access to one chrono Bri so I check my gun and go for grouping at 50yds off the bench and bag, then push out to 55yds. Been working on getting my groups down to 25mm (hard work) but often it depends on my mood and if I'm having a good day. Testing is no easy task really and can take all day but worth it as I find as it gives a bit more confidence.
I've only ever had one batch that wouldn't group at 50 (Air Arms FT batch 18) Exacts seem to be fine in my EV2 but some do group better than others.
Last edited by Yorkshiretea; 2nd April 2015 at 11:52 AM.