Range Report Is this slow for 175gr BH .308 out of an 18" SASS?

[vmpglenn]

I ran 10 rounds of 175gr BH .308 (2009 manufacture, didn't pull lot number) over the chronograph yesterday, starting with a cold bore. Shooting a DPMR LRT SASS, factory 1:10 twist 18" SS barrel. Chronograph was a CED M2, 10' from the muzzle.

Average velocity was 2428fps, not corrected for MV.

Temp was about 50F, 900' ASL, did not measure humidity but was shooting through a very light sprinkle of rain.

Does this seem a tad slow, or am I seeing temp/altitude effects? Any insight would be greatly appreciated.

 

[7mmRM]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

That sounds right for an 18" bbled gas gun.

 

[Trigger Monkey]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

I agree, it doesn't seem abnormally slow considering the set up.

 

[BHP9]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

The 175's are rated at 2600fps (no barrel length given).

Your velocity is OK for your barrel length. Loss of only 172fps.

 

[Jerz_Subbie]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

It's certainty not the fastest but I wouldn't call it out of spec or a bad lot. As others pointed out, an 18" barreled semi's velocity will be a bit lower than a 24" bolt gun.

 

[krecon1]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

I was getting 2375ish from a 16" SR25, so you're about dead on for your 18" SASS.

 

[desertHK]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

a bit on the slow side. Depending on the range of your shots, may want to go to a lighter bullet.

 

[Casey Simpson]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

I've learned lately chronos lie.

 

[Graham]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

It sounds about right for the low temp. How was the accuracy? I've had very good results with 175SMK's at 2400fps.

 

[DannySeesUSMC]

Re: Is this slow for 175gr BH .308 out of an 18" SASS?

Maybe try the Corbon 190gr. load if you can get a hold of it, should come out even faster even though it is rated the same velocity. At a 1,000 yards it's at least 40" less drop and 16" less drift if the same velocity.