I did sort a tin of 4.52 Air Arms Diabolo Field pellets. On the tin the weight is marked 0.547 Grams, which is equal to 8.44 grains.
22 pellets weighted 8.2 grain each
23 pellets weighted 8.5 grains each
4 pellets weighted 8.6 grains each.
The rest of the pellets were split more or less into equal halves of 2 weights of 8.3 and 8.4 grains.
I made the following calculations:
8.2 grain at 12ft/lb = velocity of 811.72 f/sec
8.3 grain at 12ft/lb = velocity of 806.18 f/sec
8.4 grain at 12ft/lb = velocity of 802.00 f/sec
8.5 grain at 12ft/lb = velocity of 797.27 f/sec
8.6 grain at 12ft/lb = velocity of 792.62 f/sec
A max spread of 19.10 f/sec
Now the question:
When shooting and using pellets strait out of the tin what is the change of a flyer?