In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.
Options
target rifle velocity?
annmarie
Member Posts: 2 ✭✭
Hi, can some-one tell me the muzzle velocity for a sierra matchking 44.1 varget from a 308 target rifle with a 30inch barrel? This query is on behalf of my dad, I hope I have provided the correct info to get the correct answer! thanks
Comments
Each rifle is a beast onto itself. The chamber, throat, bore imperfections, bore size, bore smoothness and many other variables make it impossible to know without shooting that gun, using that load, over a chronograph. It is not uncommon for two rifles shooting the same load to have 200 FPS differences in MV.
I get 2654 fps from 44.0 gr Varget and a 175 gr SMK out of a 28" .308 Pac-Nor barrel. A tenth of a grain of powder is not going to make a whale of a lot of difference. Two inches more barrel will probably put Dad up around 2700 fps.
I don't use the 168 gr bullet and cannot help if that is what he is loading.
Just a question. Have you shot at various ranges with the same zero? You can get pretty close to what your velocity is if you have say a 100 yd. zero and either how much you were low @300 or had to come up @300 (200 might work as well, but maybe not quite as accurate)
I'm going to assume that we are discussing the Sierra 168-grain bullet. If so, using Hodgdon data and interpolating a little bit, I think it's safe to say that your Dad's load is developing somewhere in the 2600 to 2650 fps range - possibly a bit more, but not much over 2700 if any.
To get a more exact reading, he'd have to shoot over a chronograph and measure the speed. But I think that the 2600-2700 range is probably good.
I hope that helps.
Granted, that is down (not forward) but it is accurate.
Somewhere between 2500 and 3000 fps, I'd wager my hat and house on it. [:D]