I managed a day at the range on Saturday and the predicted winds and storms arrived also, the forecasters got it right for once, lol , so conditions made it difficult for group shooting but I was impressed with the .25cal in the wind, expected that as I have a couple of .25cal powder burners and you could say I am a fan of this calibre. Anyway with the JSB Kings the numbers are~ Max. vel. - 940.3fps JSB King Heavy Mk1 ~ Max vel. - 827fps
Min. vel. -922.9fps Min. vel. - 797.6fps
Std. dev.- 4.2 Std. dev. -5.5
Avg - 931.6fps Avg. - 815.5fps
Ft/lbs - 48.95 Ft/lbs - 50.13
Total shots - 65 Total shots - 81
Found it interesting that the shot count was higher with the heavier pellets but I am not entirely sure there was a 220bar fill for the Kings as I found that the rifles gauge reads approximately 10bar less than the gauges on my bottle and Hills pump, bugger, looks like more testing, lol. Should mention that this rifle is fitted with a regulator also.
Min. vel. -922.9fps Min. vel. - 797.6fps
Std. dev.- 4.2 Std. dev. -5.5
Avg - 931.6fps Avg. - 815.5fps
Ft/lbs - 48.95 Ft/lbs - 50.13
Total shots - 65 Total shots - 81
Found it interesting that the shot count was higher with the heavier pellets but I am not entirely sure there was a 220bar fill for the Kings as I found that the rifles gauge reads approximately 10bar less than the gauges on my bottle and Hills pump, bugger, looks like more testing, lol. Should mention that this rifle is fitted with a regulator also.