308 velocity question ??

[Bungi]

I have a 30 inch barrel on my new Savage FTR.

I will be shooting Federal Gold Medal Match 168 gr BTHP

Anyone know what the muzzle velocity will be out of the 30 inch barrel?

[rksimple]

Shoot it at distance and see. It will depend on a number of variables.

If you plan on shooting 1k+, get the 175gr stuff. Better yet, learn how to reload.

[Chontkleer]

Nope. According to this, it should be about 2,762.

http://www.calguns.net/calgunforum/showthread.php?t=201149

But according to this, it should be about 2660.

http://www.tacticaloperations.com/SWATbarrel/

Tactical Operations builds 1/4 moa rifles and definitely know their stuff. Per the article, longer barrels help with hotter loads and slower-burning powder.

[707electrician]

Depends what you are shooting. The 168's should do just fine at 1k. You could try the 175's but they wont be as fast. I would try the 155's

[sigstroker]

Find out for sure:

[BigNick]

For 1k yds I would go with a heavier bullet.

[damndave]

Not sure about the exact velocity as we only chrono reloads. But for 1k shooting I would definitely use 175gr bullets or higher or use 155gr and have them screaming. Of course that will burn your barrel super fast.

[scotty99]

That load chronos right around 2670 out of my 24" barrel. A 30" will get you a little higher but I would not think as much as 100 FPS. It is the most accurate factory load I have tested.

As for all this talk about needing 175gr bullets for 1M yard shooting, if you were someone for whom that 7gr of weight and slightly improved BC would matter, you would not be asking velocity questions on a public forum. The 168s will shoot better at 1M than 99.8% of people are capable of anyway.

[rksimple]

The 168's should do just fine at 1k.

Depending on the DA, no, they won't.

[rksimple]

The 168s will shoot better at 1M than 99.8% of people are capable of anyway.

Doesn't seem like you've spent any time at 1k in 1k to -1k DA conditions.

The difference in BC between the 168 and 175 SMK is significant. One will make nice holes at 1k, the other will be sideways.

[phish]

you've got a 1:10 barrel, go big, go 185gr Berger hybrids !

[wooger]

168 smk's are not preferred on the long lines.

[DirtRacer151]

Find out for sure:

Not true at all. A chrono is never as close as the real thing. Chronos are good for load comparisons DURING THE SAME SHOOTING SESSIONS ONLY!!

Shoot it to distance, enter the known bullet BC, enter the atmospheric conditions at the time of the shot, now enter the velocity and adjust until it matches your actual dope. Save the velocity and the BC and change your atmosphere each time you shoot and you'll be good to go. %100 guaranteed to be more accurate at finding actual FPS then any chrono.

BTW 175 smk or 155 lapua scenar or sierra palma (2156). Don't waste your time on 168s or standard sierra 155s (2155)

[707electrician]

BTW 175 smk or 155 lapua scenar or sierra palma (2156). Don't waste your time on 168s or standard sierra 155s (2155)

Yes, the sierra palmas, that is what I was talking about. I've never actually used the 168's but I can tell you that the 175s and the 155 palmas work well, the 155's probably more so if you have calm wind

[Richard Erichsen]

I have a 30 inch barrel on my new Savage FTR.

I will be shooting Federal Gold Medal Match 168 gr BTHP

Anyone know what the muzzle velocity will be out of the 30 inch barrel?

Peak velocity for commercial .308 is usually in the 24-26" range. Beyond that it will be negligible.

R