Originally Posted by WEATHERBY460
hornady 58gr 243 factory ammo 3750fps at muzzle as stated on box, i got 3560fps at 10' using my f1 chrony chrono. both shot from 24" barrels my tikka and there claim on the box
How does this sound?
I am doing this because i am checking my reloads and trying to get the velocity i want. I dont know if my chrony is off, factory ammo is over rated? or i loose that much speed in 10'...please share your opinions.
Factory ammo If tested at all is tested under ideal conditions and normally a longer barrel
than most factory rifles have. But most velocities are calculated and are normally Higher
than achievable in your rifle.
I chronagraph all loads that I shoot in my rifles and have found only one brand of ammo
that normally meets the velocity advertised. (The 378 based Weatherby cases).
Remember, velocity sells and they don't mind stretching/manipulating the numbers because
every rifle is different and velocities will vary from rifle to rifle. so they feel safe and will just
say it's your rifle and not the ammo.
Also if you place hot ammo in a short throated chamber it will/would be dangerous so they
overate it and play it safe by loading it down so it can be shot in every rifle regardless of
chamber and throat dimensions.
Some rifles will come close but most won't.
J E CUSTOM