cheap chrono' cheap pocket scales

[Neil54]

If your chronograph is anything like mine it will read in metres per second and cannot be changed.
There plenty of online calculators where you input speed and weight and they tell you power.

At 670 fps ( or 204 mps) weight in grains = ft/lbs

[Biker_Bob]

If it reads in metres per second as most of the cheapie Chinese ones do, the formula is:

velocity x velocity x weight x 10.76 / 450240

for feet per second its:

velocity x velocity x weight / 450240

In both of those the pellet weight is in grains, to convert to grains from grams it's:

1 gram = 15.4324 grains

If you find that your scales don't give sufficient resolution then weigh 10 or 100 pellets at once and divide the reported weight appropriately to get the weight of one pellet.

[angrybear]

As an alternative many RFD sites have a converter, I usually use TBT's at .com it's at the bottom of the dropdown list for videos.

Oh it seems his site name is blocked

[the logun-ator]

....or simply use this http://extorian.co.uk/shooting/pellets.html
been using it for years

[cringe]

....or simply use this http://extorian.co.uk/shooting/pellets.html
been using it for years

Thank's, Simple 's I tested one of my oldest guns, a about 1910 0.25 Millita & it came out at 16 ft/lp wow! but it had desield [lots of blue smoke]. further shots regesterd approx 4- 5 ft/lbs . I am happy with that, now will have to test the rest, thanks for reply. cheers

[Aardvark55]

Hi I've just learnt some stuff from this thread. Appreciated. Would it be ok to ask what model the chrono is as I'll be looking for a starter one soon hopefully. Cheers. Marc

[Hallj]

Really good thread.
It would be nice to know what makes / models members would recommend for a general indication for a moderate budget. Perhaps there are specific ones for pistols or rifles?
Thanks for your help.