Wasabi Posted February 19, 2019 Report Share Posted February 19, 2019 So today I decided to buy a chronograph. I've spent the morning testing all sorts of stuff with a mate. The biggest surprise was .17 hmr. 17 grain hornady vmax out of a 16 inch cz455. 5 shot average at 3 metres is 2,631 fps with a spread of 61 fps. That's a lot faster than I was expecting. Have I got a hot batch or is this normal? We checked the accuracy of the chronograph using a known handled out my mates .223 and it was withing 50 fps average of what he gets on his chronograph. Quote Link to comment Share on other sites More sharing options...
Rewulf Posted February 19, 2019 Report Share Posted February 19, 2019 Whats on the box 2550 ? Doesnt seem 'that' hot ? Quote Link to comment Share on other sites More sharing options...
Dekers Posted February 19, 2019 Report Share Posted February 19, 2019 Product AND Chrono variations I suspect! Quote Link to comment Share on other sites More sharing options...
maxwell Posted February 20, 2019 Report Share Posted February 20, 2019 20 hours ago, Dekers said: Product AND Chrono variations I suspect! Totally agree Quote Link to comment Share on other sites More sharing options...
Pigeon Shredder. Posted February 21, 2019 Report Share Posted February 21, 2019 They are the sort of numbers l got when testing CCI A17’s earlier this year, now they are a nice flat shooting cartridge. Quote Link to comment Share on other sites More sharing options...
Wasabi Posted February 21, 2019 Author Report Share Posted February 21, 2019 On 19/02/2019 at 17:18, Dekers said: Product AND Chrono variations I suspect! Shot it over an expensive Oeler chronograph yesterday. Average of 2602! Quote Link to comment Share on other sites More sharing options...
Dekers Posted February 21, 2019 Report Share Posted February 21, 2019 25 minutes ago, Wasabi said: Shot it over an expensive Oeler chronograph yesterday. Average of 2602! I'd be happy, not worried. If you check a few batches/makes I rather suspect you will find some a bit slow! Quote Link to comment Share on other sites More sharing options...
Wasabi Posted February 21, 2019 Author Report Share Posted February 21, 2019 1 hour ago, Dekers said: I'd be happy, not worried. If you check a few batches/makes I rather suspect you will find some a bit slow! Not worried! Just surprised as it's out an 16 inch barrel Quote Link to comment Share on other sites More sharing options...
Rewulf Posted February 21, 2019 Report Share Posted February 21, 2019 Just now, Wasabi said: Not worried! Just surprised as it's out an 16 inch barrel The barrel doesnt make as much difference as you might think, moderators on the other hand do, as in faster. Quote Link to comment Share on other sites More sharing options...
Wasabi Posted February 21, 2019 Author Report Share Posted February 21, 2019 4 minutes ago, Rewulf said: The barrel doesnt make as much difference as you might think, moderators on the other hand do, as in faster. True. The mod is adding 50 odd FPS. Quote Link to comment Share on other sites More sharing options...
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